Build a flutter app

Am a tipster and I want an app where I will post my betting tips. This project needs two separate apps that complement each other.
1.Betting tips app to be published to google play. It should only fetch the tips of different categories
and display them for users to see.
2. Admin app that will be used to write to firebase. This one will not be published. Its primary purpose is to update the users app

1. BETTING TIPS APP FUNCTIONALITIES
- Sign up/sign in(google and phone number sign up/login)
- Free tips section that will fetch from firebase and display free tips of different categories
- Premium tips section that will fetch from firebase and display premium tips (different categories)
However, a user will need to subscribe first to view the premium tips/predictions. This section will use in-app subscription
Eg weekly, monthly etc.
-Paid tips section. This section will need to implement in-app currency(coins). Here, the part where I give the prediction
will need to be obstructed and a user will need to use coins to buy that particular tip and view the prediction. Coins should be earned by direct purchase or viewing reward ads.
-Past tips section. Here all the tips posted in a particular day should automatically move to this section everyday at midnight.

2. ADMIN APP FUNCTIONALITIES
-Add free tips section where I will be posting free tips of different categories
- Add Premium tips section where I will posting premium tips of different categories
-Add Paid tips section where I will be posting paid tips (one category only). This section should have an option where I specify the
amount of coins that can buy that particular tip
-Add/delete subscription packages for different categories
-Push notifications section where Can send notifications to users on different subjects
Only apply if you are familiar with betting concept. Would strongly prefer someone who has worked on a similar project before. While bidding start with betting so that I know you read the project requirements


Database
-should use Firebase
Can suggest another if needed