Voice call App development (android native platform)

Hi. All desgin and flow are ready to develop. (android native platform)
Everything is clear to understand in english and we made prototype to understand for each sections.
You just need to develop exactly same with design and work flow.

We requires few things as main feature.
- voice message
- voice call
- in-app payment (+ subscription)
- admob
- admin panel

I will do briefing by chat.

* I had an very bad experience with previous developer so I want to be serious this time.
* I never accept who make a delay on my project due to handle with mutiple project at once.
* I have a right to cancel the project if i think that the freelancer can't work on it on time and having quality issue.
* If you are not serious person with working, please do not waste time here.
* I prefer single develoer who can focus on my project only and communicate well.