Write android app answer calls jobs

Description: We are seeking a highly skilled developer to build a subscription-based application that will function both as a web-hosted service and as native apps on the iOS and Android platforms. This application is designed to provide our clients with a customizable system to manage their daily operations using forms. The application must feature our company branding and be designed to accommodate users aged 25–55. Key Responsibilities: Develop and deploy a web-hosted application and corresponding native mobile apps that reflect our company’s branding and visual identity. Implement a subscription management system for user registration and administration. Design a user-friendly interface tailored for an age group of 25–55, ensuring simplicity and ease...

I am in need of a freelancer to provide phone support for my customer service needs in POLISH. Skills and Experience: - General customer service skills are sufficient, industry-specific knowledge is not required. - The freelancer should be fluent in POLISH and have excellent communication skills. - Previous experience in customer service is desired. - The freelancer should be abl...call those who didn’t pick up the day before • if the customer has any question regarding his/her order, than you can look it up in the client’s system to provide proper information. There might be days when there’s no one to call – that day our reckoning would be 0. This is unlikely, though? Most probably it’d be usually 1-2 hours per day. It can be done home office. We pro...

1. Project Overview ● Title: Texas Hold'em Poker Game ● Development Platform: Unity ● Blockchain Integration: Web3 with the integration of the coin token Main Features: ● Multiplayer gameplay: Real-time poker games with multiple players. ● In-game currency transactions: Players can deposit and withdraw using the coin token. ● User profile management: Users can change their profile names and images. ● Gameplay mechanics: Includes options to bet, raise, fold, and call. ● Social features: In-game chat system for player communication. ● Customization options: Players can change the color of the poker table. ● Table management: Players can join existing tables or create new ones. 2. Technical Architecture ● Framework and Libraries Used: ● Unity: Version 2020.3.1f1 ● : Versio...

I'm in need of an experienced app developer who can create a cross-platform social networking mobile app. The app should seamlessly function on both iOS and Android operating systems. Key requirements include: - A strong understanding of mobile app development in general, and specifically, experience in creating social networking apps. - Proficiency in building cross-platform apps, ensuring a consistent user experience across iOS and Android devices. - Knowledge of best practices for user interface design, app performance optimization, and data security. - Ability to integrate social media features such as user profiles, friend lists, messaging, and news feeds. - A proactive approach to problem-solving, and the ability to test, debug a...

I'm seeking a Flutter Developer for a project, b...purpose, and compatibility platforms of my Flutter app. Therefore, I'm looking for someone flexible, who's capable of: - Handling various tasks, including UI design, app development, and bug fixing - Developing different types of apps, such as e-commerce, social networking, and entertainment - Ensuring cross-platform compatibility, whether it's Android, iOS or both Ideal candidates should have: - Proven experience in Flutter Development - Adaptive skills in programming and problem-solving - A vast portfolio, showcasing diverse applications developed For this project, the flexibility and willingness to adapt are key. While specific project details are yet to be defined, I'm confident that to...

...From connecting with friends and family to accessing news and entertainment, social media platforms have become an integral part of our daily lives. Here are some key aspects to consider: Communication and Connection: Social media platforms like Facebook, Instagram, Twitter, and Snapchat allow people to stay connected regardless of geographical barriers. They facilitate instant messaging, video calls, and sharing updates, photos, and videos, enabling individuals to maintain relationships and form new connections. Information Sharing and Awareness: Social media serves as a powerful tool for disseminating information and raising awareness about various issues. From news updates and educational content to advocacy campaigns and social movements, platforms like Twitter and Reddit pl...

I'm looking for a proficient cold caller who ...Requirements: - Cold calling expertise: You should have a proven track record in cold calling and experience in getting past gatekeepers. - Industry Knowledge: Familiarity with the plumbing and heating industry is preferable but not essential. - Communication Skills: You must be able to communicate effectively and professionally with potential clients. - Target Oriented: The desired number of daily calls is between 21-30. This is a crucial role as the potential clients you'll be contacting are within a specific industry. I'm looking for someone who can effectively represent my business and secure appointments with these potential clients. If you have experience in cold calling and feel confident in reaching my daily t...

I require a proficient app developer to create a dynamic multivendor application for selling clothes. This platform should be compatible with both iOS and Android. Key Features: - Implement a vibrant and energetic design aesthetic that resonates with my brand. - Payment integration with Tripartie. Ideal Candidate: - A developer with extensive experience in creating multivendor apps. - Proven background in designing mobile apps with a vibrant and energetic feel. - Demonstrated expertise in Tripartie integration. Your contribution will be crucial to the success of the product, so I am counting on your skills and creativity to make this app stand out from the competition.

I'm looking for an Android app developer with experience in e-commerce to help me build a cutting-edge mobile shopping application. Key Requirements: - Expertise in Android app development - Strong understanding of E-commerce platforms and principles - Experience in integrating various payment gateways - Ability to create user-friendly interfaces and seamless shopping experiences - Knowledge of secure coding practices Note: While the payment methods are not specified, it's important for the developer to have a flexible approach and to be able to integrate a variety of payment options as needed.

I need a cross-platform application developed for my personal use. The application should be centered around utility for digital currencies. Key Points: - I'm looking for a cross-platform app, meaning it should run seamlessly on both iOS and Android devices. - The app should primarily focus on providing utility for digital currencies. This could include features for tracking, managing, or even exchanging digital currencies. Ideal Skills and Experience: - Proven experience in developing cross-platform applications. - A solid understanding of the digital currency landscape. - Previous work in developing utility-based applications would be a plus.

...proficiency in building Android applications to create an app focused on selling diet plans on a subscription basis. Key Features Needed: - **Meal Tracking**: The app should allow users to keep track of their daily food intake. - **Progress Tracking**: Users should be able to monitor their progress closely. - **Personalized Recommendations**: The app should provide suggestions tailored to each individual's dieting needs and progress. User Authentication: Users should be able to register and log in using their Email and password, social media accounts or their Google sign-in details. This calls for a developer with knowledge and experience in App Security and OAuth authentication. Third-party Services Integration: - **Payment Gateway*...

...wedding clothes. They will also be able to choose from different locations as a background. This app should be compatible with Android and iOS platforms. Key Elements: - Target Audience: This app is primarily designed for individuals planning their wedding. The aim is to help them visualize and choose traditional Southeast Asian wedding attire. - Traditional Attire: The app needs to have a selection of Thai traditional wedding attire and Cambodian wedding clothes. These specific attires are essential for the app's purpose. Expected Features: - User-Friendly Interface: The app should have a simple and intuitive interface for easy navigation and usage. - AI Functionality: The core feature of this app is the AI-driven virtual dressing ro...

I require an expert to develop an advanced tracking system for Android phones, capable of working even when the device is offline. Ideal Skills: - GPS tracking expertise - Understanding of network-based location tracking - Experience in showing last known location during offline mode - Ability to curate travel history database Major Requirements: 1. GPS and Offline Tracking: The system should primarily utilize GPS for tracking and offer a feature for offline tracking as well. 2. Device Information Display: The system should be able to show the current location and travel history of the device. 3. Offline Mode Functionality: If offline, the system should senselessly show the last known location until synchronized data becomes available. Please ensure you have relevant experience...

...setting up and optimizing call campaigns to generate high-quality leads for QuickReactionCo.com. The ideal candidate will have a deep understanding of Google Ads platform, particularly in driving phone call conversions, and a proven track record of delivering successful campaigns that drive results. Responsibilities: Develop and execute comprehensive Google Ads call campaigns to drive inbound calls from potential clients interested in 's products/services. Conduct thorough keyword research and audience targeting to optimize campaign performance and maximize ROI. Create compelling ad copy and ad extensions tailored to encourage users to call and engage with our offerings. Continuously monitor campaign performance, analyze key metrics, and make data-driven decisions to optim...

...in automation with , including its advanced features and integration capabilities. - Skilled in Zapier and its applications for integration. - Strong programming skills in Python, with substantial experience in Flask app development. - Experience in creating and deploying AI chatbots across different communication channels. - Familiarity with ChatGPT and other AI models, with practical application via APIs. - Exceptional problem-solving skills and meticulous attention to detail. - Fluent in English with outstanding communication skills, available for video calls as needed. - Capable of working within UK business hours and maintaining a reliable internet connection. **What We Offer:** - The chance to work on varied and innovative projects within an ambitious company. - A ...

I am in need of a highly creative and professional graphic designer to help me create an engaging magazine advertisement. This ad is primarily aimed at promoting my range of home decor products. Key Components: - The ad should be compelling and aesthetically pleasin...to use your skills and expertise to turn our product information and pictures into a powerful visual story. Ideal Skills and Experience: - Proven experience in magazine advertisement design. - Exceptional skills in graphic design, with a keen eye for detail. - Knowledge and experience in advertising home decor products is a plus. - Ability to meet project deadlines is essential. This project calls for a critical balance of creativity and marketing knowledge. I look forward to seeing your proposals and previous wor...

I am in need of a talented sales representative to assist in our cold-calling campaign. Key Responsibilities: - Make cold calls to small businesses, introducing our company and setting appointments with decision-makers. - Understand our business model and effectively communicate our value proposition to potential clients. - Keep detailed records of calls, appointments, and follow-ups. Ideal Candidate: - Prior experience in sales, specifically with cold-calling and appointment setting. - Strong communication and interpersonal skills to build relationships with prospective clients. - Good organizational skills and the ability to manage and prioritize leads effectively. This role offers the opportunity to be an integral part of our sales process, aiding in expanding our cli...

I'm urgently looking for an experienced Android developer to help resolve a bug in my app. The app is currently crashing on startup due to a library issue. Key Requirements: - The app crashes on startup due to a library issue - The specific library causing the issue is unknown - The project needs to be completed as soon as possible, so strong communication and rapid turnaround is essential Ideal Skills and Experience: - Proven experience with Android development and debugging - Familiarity with common Android libraries such as Retrofit, Picasso, and Gson - Ability to quickly diagnose and resolve issues - Good communication skills and availability for immediate start If you are confident in your Android development skills and can sta...

...are seeking a highly organized and proactive Web Assistant from the Philippines to support our web-related tasks. The ideal candidate will have excellent communication skills, a strong understanding of Microsoft Office tools, and the ability to engage effectively in daily calls with stakeholders. This position offers a great opportunity for growth within a dynamic team environment. Key Responsibilities: Assist in the management and upkeep of the company's website and related tasks. Schedule and participate in daily calls with stakeholders to discuss updates and resolve issues. Utilize Microsoft Office tools to create and manage content, reports, and presentations. Coordinate with team members to ensure smooth execution of web projects. Manage email correspondence an...

I'm starting a new enterprise and require a proficient developer for building a video calling app that can run seamlessly on Android and iOS. Knowledge of Flutter, NodeJS and ReactUs is essential to navigate this project successfully. The app should cater to both one-to-one and group calls, enabling users to communicate flexibly. Integrating the app with Connectycube would be an added advantage. The design needs to be minimalistic, practically inclined toward high usability rather than flashy animations. This will drive users to enjoy a smooth user-experience, aiding in seamless navigation through the app. In summary, I need: - High proficiency in Flutter, Node.JS, and ReactJS - Experience in integrating Connectycube - Ability to deliver a...

Overview We are currently seeking a highly experienced Senior Android Kotlin Developer for an urgent project involving the communication between two mobile applications via AIDL (Android Interface Definition Language). The ideal candidate should preferably speak Turkish and be ready to start immediately with the capability to deliver within a tight deadline. Project Description The project involves creating and managing communication between two mobile applications designated as Master and Slave using AIDL. The Slave application already contains written AIDL interfaces. The tasks for this project include: Developing a Simple Test Application: To test the existing interfaces. Reviewing and Optimizing the Slave Application: Examine the parameters and code of the Slave applica...

I'm currently looking for a freelancer who can help me source a high-quality stock video which is in the link here: The video footage above will need to be sourced in an HD format so I can use it on my website. Please answer the following questions below: 1. Can you source the same video without the watermark? 2. Will you accept $15? 3. How long will it take you to do? Good Luck, TC

I'm seeking a diligent and professional individual capable of handling a variety of tasks. Expectations for this role include: - Performing hotel room cleaning and organizing, ensuring a tidy and comfortable environment - Running necessary errands - Decorating the hotel room for a birthday/bachelorette party, demonstrating impeccable taste and creativity - Providing punctual wake-up calls to start the day off right The position would require you to work for three days, offering flexibility within those days. Please note that while you will not be provided with a uniform, maintaining a well-groomed appearance and professional dress is of utmost importance. Ideally, you would possess strong time management skills, a keen eye for detail, and solid task planning abilities. Expe...

Basically this application is for Pizza restaurant, that will be use by taking orders.   screens that tobe developed. 1. Login (simple 4 digit passcode to login)this is developed, Need to make better design. 2. Order page (based on phone number, Its developed and working fine)this is developed, Need to make better design. 3. Menu page(select item and gives you 2 options - add to order or modify item) this is developed, Need to make better design. 4. item modify page(select extra toppings for pizza or allow removing topping that are exist in select pizza)This is created but not finished. 5. order rivew page.(let you review all added item to order, modify qty and let you add note)-on this page checkout button will save data into database and print on label printer. Note: to avoid bots,...

I need an Android developer for some easy Tasks now/Pakistan or Indian developer only I need work at low budget I need work for long term

...user-friendly web app for both Android and iOS platforms. The primary goal of this app is to increase sales and conversions, so it should be optimized for a seamless user experience. Key Functionalities: - User Authentication: The app should have a robust user authentication system to secure user accounts and data, and provide a personalized experience. - Offline Capabilities: It would be fantastic if the app could function in offline mode as well, ensuring seamless service delivery even in the absence of internet connectivity. Specific Requirements: - UPI Payment/COD Integration: I need the app to support Unified Payment Interface (UPI) as well as Cash on Delivery (COD) for transactions. A seamless, secure and reliable payment gateway is cruc...

I want an experienced developer to create a server specifically designed for hosting a gacha style mobile... they'll also teach me how to operate it efficiently. Here are my specific requirements: - The server should seamlessly support both iOS and Android platforms. - It should manage player accounts efficiently. - Built-in systems to support in-app purchases and handling of virtual currency are necessary. - Teach me how to run it / Build APIs / Check player records. PS : I am a beginner, learned how to code server side on playful free tier server, nothing more. The ideal candidate will have experience in developing and operating mobile game servers. Familiarity with iOS and Android platforms is a must, as well as experience integrating in-app pu...

I'm seeking a skilled developer...in Flux Builder, particularly for mobile app development. The app should be designed for both iOS and Android platforms. Key Requirements: - Proficiency in Flux Builder - Proven experience in mobile app development, especially cross-platform - Expertise in designing for both iOS and Android Additional Details: - The app will need to integrate with various payment gateways, so experience with this is a plus. Ideal Skills: - Flux Builder - Cross-platform mobile app development - Proficiency in iOS and Android design conventions - Experience with payment gateway integration Please provide examples of previous work in Flux Builder and cross-platform mobile app development. We're loo...

I'm looking for a proficient cold caller who ...Requirements: - Cold calling expertise: You should have a proven track record in cold calling and experience in getting past gatekeepers. - Industry Knowledge: Familiarity with the plumbing and heating industry is preferable but not essential. - Communication Skills: You must be able to communicate effectively and professionally with potential clients. - Target Oriented: The desired number of daily calls is between 21-30. This is a crucial role as the potential clients you'll be contacting are within a specific industry. I'm looking for someone who can effectively represent my business and secure appointments with these potential clients. If you have experience in cold calling and feel confident in reaching my daily t...

I'm looking for a talented game app developer who can create an engaging and cost-effective game similar to Ludo or cricket for the Android platform. Key Requirements: - Development of an Android-based game app - The game should target adult players, so the design and gameplay should be suitable for this demographic - Monetization strategy should primarily involve a "pay and play" model, ensuring profitability without compromising user experience Ideal Skills and Experience: - Proven experience in Android game development - Understanding of game design principles, particularly for adult audiences - Prior experience with implementing "pay and play" monetization models - Excellent communication skills and the ability to work coll...

I am seeking a designer for a mobile app/ webpage that allows scheduling live streaming from an RTSP video input to a YouTube channel. Key Requirements: - Supports both iOS and Android platforms (mobile-friendly web browser - also PC-friendly) - Incorporates simple user accounts for easy access - Enables live streaming to be triggered both automatically at scheduled times and manually by the user. - UI Interface: User logs in and based on access, can view/modify schedule or start streaming automatically - Open to discuss if this should reside on a hosted Windows server or other - Should be written in c# or vb.net Ideal Skills: - Proficiency in mobile app and webpage design - Experience in live streaming and YouTube API integration - Understanding of video streaming...

...Features: - Real-time Control: The software should be capable of controlling the laser marking system efficiently and in real time. - EZCAD2 Compatibility: The system should be seamlessly compatible with the EZCAD2 software to allow smooth operations. Interface: - Both Command Line and Graphical User Interface should be utilized for robust, versatile, and user-friendly control. This project calls for a professional with expertise in software development, particularly for control operations, and a sound understanding of laser marking systems. The ideal candidate for this undertaking should be well-versed with EZCAD2, Python programming, and real-time control systems. Experience with command line and GUI development will also be advantageous. Your bid should reflect your abili...

Need an expert on C# who can carry out coding of a task. And then write a report for the task, that discussed the algorithm, run time, efficiency and answer some questions. In 3 to 4 days

I'm seeking a proficient developer to convert my existing Android medical app into an iOS version. The core functionalities of the app include: - Appointment scheduling - Symptom checker - Medication reminders Ideally, you should have prior experience in converting Android apps to iOS and a good understanding of both platforms exhibiting fluency in app development for them. Understanding medical applications would be a plus. Once completed, we can discuss extending the scope of work for future developments. I can provide the built APK for reference. Please confirm your expertise in these areas and your approach to the task when bidding.

...Ads Incorporation of Reddit Ads is optional but will be considered a plus. Target Customer: Owners of small to medium-sized eCommerce businesses looking to find reliable dropshipping suppliers. Goals: Increase upgrades (i.e, trials for monthly subscriptions or sales of annual subscription) by 15% month-over-month. Maintain a Cost per Acquisition (CPA) below $30. Based on the above information, answer the following questions: Create a 12 month plan to achieve the goals. Provide a detailed budget plan showing how you would distribute the $200,000 budget across the specified channels. Provide a clear rationale for your allocation strategy. Share channel specific tactics Google Ads: Outline the account structure for Search campaigns, including keyword strategy and match types. ...

...need of an iOS developer who can successfully port my current Android app over to the Apple App Store. Key Functionalities Needed: - User Login and Registration: The app should allow users to sign up, log in, and manage their account information. - Push Notifications: The app should be able to send timely notifications to users on their iOS devices. Your Application: To be considered for this project, please share your relevant experience with developing iOS apps. I'm looking for a developer who has a strong background in iOS app development and can demonstrate a successful track record. Main Objective: The primary goal of this iOS app is to help me generate revenue. I'm looking for a developer who can optimize the ...

I'm a full-time employee with no additional income sources or tax deductions/credits. I need a professional to help me file my taxes. The ideal candidate for this job should have: - Proven experience in tax preparation for full-time employees - Deep understanding of tax laws and regulations - Strong attention to detail to avoid mistakes - Good communication skil...full-time employee with no additional income sources or tax deductions/credits. I need a professional to help me file my taxes. The ideal candidate for this job should have: - Proven experience in tax preparation for full-time employees - Deep understanding of tax laws and regulations - Strong attention to detail to avoid mistakes - Good communication skills to guide me through the process and answer any questions t...

As the project lead, I'm seeking a highly skilled mobile app game developer with a proven record in card game development. This project involves creating a new upcoming game but in a classic card game environment for both iOS and Android platforms. This app will be primarily catered towards adults (ages 20 and up). Essential skills and experience: • Experienced in developing games for both iOS and Android platforms • Proficient in creating engaging and interactive card games • Unique understanding of what appeals to adult gaming audiences. • Previous experience in releasing games commercially would be an advantage. -some guidance in the possibilities of creating skill bases betting -lead the project from start to finish, including budg...

... Target businesses that require website revamps or ongoing maintenance/support. -Sales Conversion: Initiate contact via calls or emails to potential leads. Convert leads into paying customers by effectively communicating the value of our services. -CRM & Lead Management: Set up and manage a CRM system to track leads, calls, and follow-ups. Ensure timely follow-up with leads to nurture relationships and close sales. -Cold Calling: Conduct cold calls to prospective clients to introduce our services and generate interest. -Inbound Lead Management: Respond to leads received through our website, Instagram, and social media channels. Engage with potential clients via calls and emails to discuss their needs and propose solutions. -Graphic Design & Brand...

android and ios application. Application with Registration The data we need to store is: ID, full name, address, city and telephone number. You can log in with your ID and a password created previously in the registry. It is for my diesel distribution company. When entering the application I want it to show the Price per liter that is that day, for example 1,054 Eur/liter That you can indicate the liters you want and be able to send that to my email. In the email I want to receive all the client's information. The price per liter/eur varies depending on the customer's population. I have to have some way to control that. Finally, I would like to be able to send notifications to clients with personalized offers depending on the population or to everyone.

I'm in need of a skilled developer to create a UPI payment app similar to Phonepe, Google Pay, and Paytm for Android. The key features that should be included are: - Peer-to-peer (P2P) transfer: Users should be able to transfer money to other users seamlessly. - Bill payments and recharges: The app should facilitate the payment of bills and recharging of mobiles. - In-app merchant payments: It should allow users to make payments at various merchants using UPI. The project needs to be completed within a month, so I'm looking for an experienced developer who can deliver a high-quality app in a timely manner.

...BitBucket are required. Description: (Please see attached FILES to see a detailed description) I am seeking a skilled front-end developer to bring our event management application to life. This application empowers enterprises to efficiently create and manage event profiles, providing a dynamic platform for event interaction through features like live song requests. With Stripe integration, the app ensures secure financial transactions, while a user-friendly interface guarantees a seamless user experience. Each profile, linked to a unique QR code, grants access to real-time event information, facilitating engagement and streamlined event management. Upon scanning the QR code, users are directed to a webpage displaying the event details. Here, they can search for and request so...

I am seeking an individual to test our Android mobile application SMS features. - SMS sends and receives consistently. - No lag or delay in SMS transmission. - SMS communicates correctly with other features of the app. Skills and Experience: No Skills just Android Phone Required

I have existing chat application I want to add ai chatbot to it

...identity, which we will provide, to develop a comprehensive suite of marketing essentials. This project is perfect for someone who enjoys creating cohesive and visually appealing materials that reflect a brand’s identity. Requirements: - Logo Redesign: Refresh our current logo to resolve issues with pixelation and enhance overall quality. - Video Call Backgrounds: Design custom backgrounds for video calls that reflect our corporate identity. - Word Templates and Project Proposals: Create templates for documents and proposals that are user-friendly and visually aligned with our brand. - PowerPoint Templates: Design templates for presentations that are both professional and creative. - Invoice Templates (Excel): Develop invoice templates that are clear, professional, and in...

I am seeking an experienced UI/UX designer to create a user-friendly and intuitive design for a real-time fuel price tracking mobile app for both iOS and Android platforms. The app will not only display the current prices of fuel from nearby gas stations but also provide detailed features like: - Gas station reviews - Navigation to the selected gas station - Opening hours of gas stations The ideal candidate for this project should possess strong expertise in UI/UX design with a solid understanding of interactive application development. Experience in designing location-based service applications or similar platforms would be a major plus. The objective is to create a seamless and optimal user experience. Your design should facilitate real-time data updates, and effec...

android and ios application. Application with Registration The data we need to store is: ID, full name, address, city and telephone number. You can log in with your ID and a password created previously in the registry. It is for my diesel distribution company. When entering the application I want it to show the Price per liter that is that day, for example 1,054 Eur/liter That you can indicate the liters you want and be able to send that to my email. In the email I want to receive all the client's information.

As an avid gaming platform user, I'm looking for a Chinese speaking support personnel to offer technical support and answer user queries in Chinese fluently. Here are the key details about the project: - Skills Required: The ideal candidate should have an in-depth understanding of networking to assist with technical issues. - Gaming Platform: This role requires a deep familiarity with mobile gaming platforms. Experience with various genres and mechanics within mobile games is a plus. - Communication: The support personnel will be expected to interact with users through live chat. A friendly and professional demeanor is essential to ensure customer satisfaction. I look forward to hearing from qualified candidates who can bring their technical expertise and passion for gaming ...

...registration, payment integration, and API integration. Key Responsibilities: - Implement user authentication and registration: The application should allow users to sign up, log in, and manage their accounts. - Integrate payment systems: The application must be able to process payments securely and efficiently. - Implement APIs: The application needs to interact with external services through API calls. Ideal Skills: - Proficient in Laravel: You should have a solid understanding of Laravel and its ecosystem. - Experience with user authentication and payment integration: Prior experience in implementing these functionalities is a big plus. - Familiarity with API integration: You should be comfortable working with APIs and handling data exchange between the application and exte...

I WANT AN INSTANT MESSAGING SOFTWARE, SIMILAR TO WECHAT OR WHATSAPP SOFTWARE, WHICH NEEDS TO BE APPLIED ON ANDROID AND MACE, THE FUNCTION DOES NOT NEED TO BE TOO COMPLICATED, AND IT NEEDS TO HAVE THE FUNCTION OF MOBILE PHONE REGISTRATION (AND CAN RECEIVE VERIFICATION CODES FOR REGISTRATION IN VARIOUS COUNTRIES). The number of people online at the same time cannot be less than 500.