Lottery Simulation Mobile App

I need a mobile app that simulates a lottery. It should be developed for the iOS platform.

Key Features:
- Random number generation: The core function of the app is to generate random lottery numbers for the user.
- Notification of results: The app should notify the user of the 'results' in a lottery-style format.
- In-app purchasing: Users should have the ability to purchase 'coins' which would allow them to add an extra number to their ticket.

Ideal Skills:
- iOS Mobile App Development
- In-app Purchase Integration
- Random Number Generation Algorithm

Experience:
- Prior experience in developing mobile games or simulation apps is highly preferred.
- A good understanding of lottery systems will be an added advantage.