Swift App with In-App-Purchases

I'm looking for a skilled iOS developer to bring my project to life. It's an informational gambling app that requires a sensitive understanding of user experience and technical know-how to integrate in-app purchases effectively. Here's what you need to know:

- *apple / swift*: The app will be exclusively for iOS devices.
- We have already designed the full app and its functioning
- We need support with getting our IOS subscription working. There are 3 components we're looking for:
1. Process in-app-purchase (note we have this built and working - validate its correct. e.g should we store expiry date? Subscription is weekly 7 days).
2. When a user logs in, we need to validate the transaction is valid
- If is, proceed to main UI
- If its expired, route to subscribe page (user shouldnt get access to app unless subscribed)
3. Enable referral codes at time of payment (we have 2 setup and UI built). Need the iAP to consume the code and store in our database.

**Skills and Experience**:
- Proficient in iOS development with Swift.
- Experience with implementing in-app purchases.
- Familiarity with Apple's App Store submission process.
- Attention to UI/UX design for optimal information delivery (guide us if changes are required)
- Adept at working with existing Informational app templates or frameworks.
- Knowledge of Apple's Human Interface Guidelines.

I'm excited to collaborate with a developer who can guide this app from development to a successful production launch. Your insights on ensuring a smooth user experience with the inclusion of a secure payment system will be highly valued.

Our app is going through apple review so it may be LIVE. These changes will be added as our post release.