I have published MasterGear-Android 2.8.11 today, the new version of my Sega MasterSystem, GameGear, and SG-1000 emulator:

https://play.google.com/store/apps/details?id=com.fms.mg

This release adds a bunch of hardware emulation options, previously only available from the rather unfriendly Advance Settings menu. Starting with this version, you will be able to tweak how VDP emulation works, whether your MasterSystem will have Yamaha´s OPLL sound chip and the 93c44 serial EEPROM.

• Added "Hardware Options" screen to the Settings.
  
• Added "Show All Sprites" option to the Settings.
  
• Added "Delay VRAM Reads" option to the Settings.
  
• Added "Show PAL Video" option to the Settings.
  
• Added "YM2413 (OPLL) Sound Chip" option to the Settings.
  
• Added "93c44 Serial EEPROM Chip" option to the Settings.
  
• Added "CDMasters Memory Mapper" option to the Settings.
  
• Added missing string translations.
  
• Added DropBox application icons.