Tela GBA is a fork of GBA4IOS. Therefore it is an unofficial version of said open source project.
I have repaired a lot of the features that were originally included, see a list of features below.
A GBA, GBC, and GB emulator with many different features such as:
Bluetooth Controller support (Working on adding more button maps/map selection)
Custom Controller Skins
Dropbox Sync – Partially Working
Game Boy Color Support
iOS 7 Controller Support
Google Drive Sync