Ask for rating for unity3d. Same as other libraries, but I will bring all logic to unity namespace to allow easy one place changes.
- http://www.androidsnippets.com/prompt-engaged-users-to-rate-your-app-in-the-android-market-appirater
- http://gamesfromwithin.com/increase-your-app-ratings-on-the-app-store
- https://github.com/arashpayan/appirater
- https://github.com/nicklockwood/iRate
- http://stackoverflow.com/questions/433907/how-to-link-to-apps-on-the-app-store
- https://developer.apple.com/library/ios/qa/qa1633/_index.html
- https://developer.apple.com/library/ios/qa/qa1629/_index.html