IMPORTANT: There is also a free version of PPSSPP, with identical functionality:
Buy PPSSPP Gold only to support further development of PPSSPP. Feel free to download the free version linked above if you want to.
PPSSPP is a PSP emulator for Android and other platforms. It is being developed at a rapid speed and compatibility is increasing quickly, but there are many games it doesn't run yet and it doesn't run fast on Android yet.
Please go to http://www.ppsspp.org for more information.
No games are included with this download, you will have to dump your own PSP games and turn them into .ISO or .CSO files, or simply play free homebrew games, which are available online.
PSP is a trademark of Sony, Inc.
IMPORTANT: Please do not give bad reviews due to low compatibility. It takes time.