An emulator for iOS called GBA4IOS 2.0 was recently released and supports Gameboy Color. I tried LSDJ and while it loads fine, it doesn't allow you to save. Instead of saying 'Save/Load' it says 'Reset Memory'.
The same rom works fine on another emulator called Gearboy. However that uses it's own savegame format which is not compatible with other emulators and real GB devices.
GBA4IOS does support the usual savegame format, but LSDJ doesn't work. I noticed the save file is 32kb. Is that too small for LSDJ?