mobile application with Admin Panel to manage

Note : If you have readymade script then its best
https://play.google.com/store/apps/details?id=com.digitalpost.app
Digital Poster Creator with Admin Panel with all the features that is available in that application
Please check the app and what function you can provide in the Backend needed as well.
Give the Best Quote for this
Admin task
1. Manage users
2. Manage packages
3. Upload Frames, Images, Post
4. Payment Integration for a subscription plan
5. Sales Tracker
6. Create Groups ( for frames or posts )
7. Anything left for managing Users, Groups, Account, Payment gateway, Post, Images, Frames has to be done by default
users task
1. Download
2. Install
3. Signup / login
4. Choose packages
5. Logo, name, address, phone no , emailed, WhatsApp , social media icons, sticker, emojis or any text they want can add on post or images.
6. Render , download or share on social media or Whatsapp
7. Can see the history of images rendered
8. Can see groups / post / frames as uploaded from backend admin
9. Can upgrade or downgrade plan
10. manage their account
11. Anythign left for managing above points should be done automatically.