Hello,
We are "Expert" and read your "requirement carefully".
I have a well experiance android team and we have work on several fields like GPS live updating data, Task Manager , App locker , weather information system,
insurance app, NFC tag reader/writer and blue tooth based app.
I will make your app according to your functionality and read your requirement carefully , one more functionality will be make you app good like offline data management.
Before start work on this project I will show you a small demo please let me know you when you will available.
Tag contain the encrypted String data.
Thanks.