I am developing mobile Applications(iOS) with backend & I am working with my small team and having 5.5+ Years of experience, I will always make sure that the client side should be very clear regarding the requirements
* Bugs solving, Covert your website into apps
* Payment integration, MAPs, GPS, SQLite, Core data, Wifi, PDF rendering, Payment gateway integration, In-app purchase
* Firebase, Chat Applications
* Service Based apps
* AWS integration, Social integration,
* Social media integration, Any type of ads integration
* E-commerce apps, Uber clone apps,
* Upload your app to Appstore, Fixed bugs for submission