When comparing MasterGear - SMS/GG Emulator vs GENPlusDroid, the Slant community recommends GENPlusDroid for most people. In the question“What are the best Sega Game Gear emulators for Android?” GENPlusDroid is ranked 1st while MasterGear - SMS/GG Emulator is ranked 2nd. The most important reason people chose GENPlusDroid is:
It's completely free to download and use making for a good choice for those that do not want to purchase an emulator.
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Pros
Pro Bluetooth controller support
It supports the Xperia Play, Moga gamepads as well as HID gamepads. This way anyone can use the controller they like with the games in the emulator.
Pro Supports landscape and portrait orientations
Depending on how one wants to hold their device this emulator will work wither way making for a convenient emulator as far as orientation goes.
Pro Free to download and use
It's completely free to download and use making for a good choice for those that do not want to purchase an emulator.
Pro Supports multiple Sega systems
Sega Mega Drive / Genesis and the Sega Master System are both supported seeing that ROMs for each play through the emulator.
Cons
Con Non-Free
It costs 4,99€ to buy, which may be expensive as there are a few free options available.
Con Requires a good phone with high specs
Heavy usage on this one makes for slowdown on cheap phones that have low specs. A higher end phone is definitely recommended to use this app smoothly.