You want to refine the design of your iOS app to convert as many users as possible. Currently, this involves a lot of guesswork trying to understand user behavior, and a lot of lost time going through the App Store's submission process.
Instant, native A/B testing. Upload multiple designs, push them out to your users, and test them against each other.
After enough data is gathered, serve up the most effective design to all of your users, and start enjoying the benefits of universal higher conversion right away.