REW is fine, I just like OmniMic based on experience. I find it easier to use.
Both will get the job done and both include test signals.
Course, if you want to get really basic, with an Android, get Audio Tools and a $20 imm 6 from Dayton audio
Both will get the job done and both include test signals.
Course, if you want to get really basic, with an Android, get Audio Tools and a $20 imm 6 from Dayton audio