A couple quotes from Lory’s review:
I’m so happy to have found out about this “slow downer” app. It was pivotal in helping us[my band] learn the notes to some of the more complicated solos for the cover songs on our set list. What makes this app so cool is that it slows down songs without changing the pitch. If you’ve ever tried to figure out what Dave Mustaine is doing in “Killing is My Business,” you know how hard it is to learn some of those shredding riffs by the greats.
There are so many helpful features with this app that the developer must have first-hand experience trying to learn cover songs. I imagine him sitting on his living room floor at 18 years old, playing a beat up copy of “Hell Awaits” by Slayer, and frustratingly trying to play along.
Check out the full review at Musician’s Corner