Best app so far to study song !

I was using the "Music Speed Changer" on Android : nice slow down and pitch change, AB repeat is only basic and user friendly.

I am now using "Audipo" on Android : great AB repeat, in fact more like ABCDEFGHIJKLMNOPQR repeat : first set indexes on the music where you want, then navigate easily to choose the parts that you want to rehearse. The slow down works well to 15% slow, not so good above.

I am using easy voice recorder pro to record myself with my phone, but if I go to a concert then I use a Zoom H5 because the phone microphone is not good when the volume is loud.