Here are some important links for information around Serenity.
Wiki:
https://github.com/NineWorlds/serenity-android/wiki/Serenity-for-Android
Keyboard and Remote Shortcuts:
https://github.com/NineWorlds/serenity-android/wiki/Remote-and-Keyboard-Controls
FAQ:
https://github.com/NineWorlds/serenity-android/wiki/Frequently-Asked-Questions
Google Play:
https://play.google.com/store/apps/details?id=us.nineworlds.serenity&hl=en
Development Downloads:
https://github.com/NineWorlds/serenity-android/wiki/Downloads
Serenity is an alternate Plex Client for Android based devices. It is primarily designed for TV viewing in mind, but works well on most android tablets and some Android Phones (Nexus 4).
If you have questions or feature requests please feel free to post them in the forum.