Help me build a mobile calling app

User-friendly voice and messaging app with enterprise security.


No backdoors, no man-in-the-middle attacks

Unlimited peer-to-peer calling with out-of-network calling

Unlimited peer-to-peer calling

Call Mobile or Landlines = VOIP Calling

Secure messaging and file transfers

Scheduled burn functionality on both ends

Available for any Android or iOS device

Skills: Android, VoIP, Mobile App Development, Asterisk PBX, iPhone

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About the Employer:
( 0 reviews ) London, United Kingdom

Project ID: #21810926

31 freelancers are bidding on average £904 for this job


Greetings, Thanks for the opportunity. AIS Technolabs (Expert Mobile Developers) is a dedicated team with over 8 years' experience and a strong workforce of 240+ Professionals. Understanding: I have gone through your More

£5900 GBP in 30 days
(69 Reviews)

Hello ,hope are you well there I have seen your requirement and I am interested in this.I am ready from now to work on your app. i have 7 years of experience in mobile (android / ios ) app development. I will complete More

£300 GBP in 5 days
(38 Reviews)

Can you share the URL of the reference app? Please share the complete project features you want on an app? We have gone through the project description that you want to build a Calling application. We will make Cre More

£750 GBP in 30 days
(41 Reviews)

Hello, Greetings of the day! I saw your proposal and understood completely. We are a team of expert developers and have more than 8 years of experience in the same domain. We will complete your task on time and on bud More

£500 GBP in 7 days
(22 Reviews)

Greetings from Capanicus! We are comfortable with the work and can do with ease. We are a VoIP solution provider and have working experience of 10+ yrs on Asterisk, Freeswitch, A2billing, FreePBX, Elastix, MOR billing More

£700 GBP in 37 days
(14 Reviews)

Hello, Greetings for the day! I am an expertise Mobile App Developer having 5+ years of experience. My passion is to develop and deploy any kinda mobile application and I have always shown a keen interest in developi More

£4500 GBP in 21 days
(15 Reviews)

Hello, I have 6 years of experienced on mobile application ( iphone/ ipad+ Android ) and App admimn with development web services where admin can manage the app from backend I have developed the TAXI apps, google More

£500 GBP in 12 days
(15 Reviews)

Hello Hope you are doing well. I have checked your project description in detail , and I am very interest in your project because I have completed very similar project last time. We have developed lots of mobile app More

£500 GBP in 7 days
(8 Reviews)

Hello I read your project post and understand you need calling [login to view URL] per your need i will make your project with complete features and functionality. I am expert in mobile (android and ios) app design and developme More

£300 GBP in 7 days
(17 Reviews)

Hello I’ve read your project description and can know that you're looking for a developer to design and build a voice messaging app. This is a senior developer with over 8 years of professional experience in mobile a More

£500 GBP in 25 days
(7 Reviews)

Hello there, How are you doing?. I have read the description, I have great experience doing similar jobs related to these skills Android, Asterisk PBX, iPhone, Mobile App Development, VoIP. Right now I am placing a More

£555 GBP in 5 days
(22 Reviews)

Hello, Hope you are doing well ! We are a team of expert developers. We have been in this profession for the past 8 years and we have completed many projects previously. My team have looked up your requirement. We are More

£250 GBP in 7 days
(2 Reviews)

Hello, Hope you are doing well !! I read your job description completely and i found my skills relevant to your project. I am having 3+ years of experience in same domain with satisfactory results. I can assure you fo More

£500 GBP in 7 days
(2 Reviews)

Hello, Greetings! I have analyzed your project requirement in detail, as per the analysis I need to develop an Android app.I would like to inform you that I have extensive experience in development of Android apps. He More

£625 GBP in 18 days
(17 Reviews)

Hello, I am a full stack developer. I have gone through your project posting development your Mobile App(Android / IOS). As per your requirement. I am familiar with all the required technologies and I have experien More

£300 GBP in 7 days
(5 Reviews)

I’m a Technical Architect of (Wowza / AWS) for Live Video Streaming Service Expertise in Nimble, Red5, Wowza / Google Cloud / JWCloud Peer to Peer / Websockets / WebRTC / RTMP / RTSP/ HLS Core Skills * Live More

£500 GBP in 7 days
(5 Reviews)

Hello We are a team of experts, we can design any web page and make it functional with any back end technology whether it is php, laravel, ci or wordpress. We are having some fine developers for CMS and server side scr More

£500 GBP in 7 days
(3 Reviews)

We can develop an app just as per your requirement. We have hands on almost all technologies and platforms. Let's chat to further discuss the requirement so that we can share the proposal with you.

£600 GBP in 7 days
(1 Review)

Hi, I am a PhD of artificial intelligence. I have 18 years experience in software development. I propose you 2 options for the backend: 1- PHP+ AngularJS, 2- ASP.NET MCV Core. each one has its price. I can also develo More

£250 GBP in 15 days
(3 Reviews)

Hello, ON-DEMAND DELIVERY SERVICE iOS/Android app can be definitely developed by us. As, we've developed wide range of apps in past with positive feedback from clients. So, we can surely help you to build app with hi More

£600 GBP in 7 days
(3 Reviews)