Build me a mobile application

Hello ,

I am interested in application like https://play.google.com/store/apps/details?id=com.testbook.tbapp

This is a admin control application.
It should be implemented using Android/ios service.

Basic functionality:
Admin should be able to to adjust settings for each and everything .
Admin can set up a password that allows to turn off the application functionality on user's phones.

Admin should be able to set time limit to use User's Phone.

Need to develop demo first .

Thank You.
DSV Infosolutions Pvt. Ltd.