We specialize in app creation with mobile payments. 

We can help you with: 

1. RevenueCat set up 
2. Apple App Store Connect set up 
3. Google Play Console set up 
4. Fixing issues
5. Maximizing in-app purchase revenue 
6. Connecting marketing and analytics integrations with mobile app  

We've done complex and uncommon development work about Apple and Google in-app purchases:  

1. Migrating old payment systems to new ones 
2. Subscription price rise with thousands of active subscriptions 
3. Changing app owner, when an app is sold 
4. Running subscription promotions 
5. Compatibility of subscriptions between iOS, Android and Web apps 

I can consult you about whether to use Apple and Google payment systems or a Web-based system like Stripe, PayPal or similar. 

And how to avoid Apple & Google app review rejections when your app is about to launch.

Book a free consultation with out CEO Marcin: https://calendly.com/call-with-marcin/strategy-consultation