Make android/apple UP SYSTEM APPLICATION

How our up system works... we are a cell phone company If you get here first, you get the first customer. Even if there is two people on shift at same time and you get there 5 minutes early, you get the first customer. When you are done with a customer you go to the end of the line. We are looking for an app so I can upload a schedule, employees can login to show who got there first and it will create an up order. If it is your “UP” a push notification will be sent to your phone via the app. Or if you're close to being up, a push notification will say HEY you are almost up! Once a customer sits down, in the app you should be able to click “With customer” which would then not put you on the list, and when you are done the app should allow you to click “Finished with customer”. Then it would put you in the back of the “UP” order. There should also be a button that says “On appointment” which would also remove employee from up order. If you can also make an admin side for the manager on duty to change the up order, to remove employees if they go home sick or send push notifications out. Needs to work on Android/iPhone