The app is high priced and I confess I got it when it was $5 but I love it so much I payed full price to gift it to my daughter who's a singer. Setting the songs to mono helps greatly when using pitch and or time change as far as quality goes.
The app lets you save multiple loops for each song and a lot more. Great for putting a song that's slightly off concert pitch into correct pitch to save having to retune to the song. You can change pitch by fractions of a semitone for example. When moving within the timeline or adjusting pitch/time etc, after double tapping and holding until the tritone, moving up the screen before moving left or right decreases the incrimental movement so you can fine tune. When I had to learn 15 songs in a week and a half for an out of the blue gig it was invaluable. One example: if there is a recording you like but the tempo is a bit fast or slow, you can change the tempo without changing pitch and save it as a preset. I've used it a lot with both time and pitch changes as well as the loop feature. Speed up or slow down is extremely easy to do and use your imagination about all the various situations where this can be useful. I only found this app this year but as far as accessibility goes, I have no problem.
