Desenvolver um Software

I need a very simple prototype for a proof of concept. I just need to demonstrate that an app may interact with Facebook Messenger. The prototype should conect with Facebook, show a list of the most active friends and, when I click in one of them it must start facebook messenger. There must also be a field that I can fill with the amount of seconds that the conversation can last. When this time is over the app should break the Messenger conversation. I just want to proof that this can be done. Don't worry with layout. If the proof is successfull there will be a whole project on the new future around it. I must be able to test this prototype without having to upload it to google store and the like.