Chat Management App Development

I need a mobile app developed for Android that enables me to manage chats on general messaging apps from 10 different phones.

Key Features:
- View and reply to messages
- Set up automated responses
- Admin can send mass messages to all users

Requirements:
- Android app development experience
- Familiarity with integrating multiple messaging platforms
- Experience with user permission and access management

Looking for a developer who can deliver a secure and user-friendly app.