Need a developer to build a application

We currently have a fully functional web application integrated with the Meta Messaging API, where multiple Instagram accounts are connected in one dashboard. Through this system, we can view all Instagram inboxes in one place and reply to DMs directly, just like Instagram.

Now, we are looking to build a mobile application (Android & iOS) that includes all existing features of the web application, with the same functionality, performance, and security.

Core Requirements:

Integration with Meta Messaging API

Connect and manage multiple Instagram accounts

Unified inbox showing all Instagram DMs

Real-time chat and reply functionality

Smooth UI/UX similar to Instagram DM experience

Secure account authentication and data handling

Scalable architecture for future features

What We Need From You:

Confirmation if you can develop this mobile application

Suggested tech stack (frontend + backend)

Estimated development cost

Timeline for completion

Ongoing maintenance and support options (if available)

Please share your experience with Meta APIs and similar messaging platforms, along with a rough cost estimate.