5 stars: Perfect piano is well, really perfect. You can change it to any type of piano that you want. All you have to do to get a piano you don't see, is to watch an ad. But the reason I didn't really like the app well is that the songs are a bit to easy. But other than that, I love the app. Oh and by the way, if you go to keyboard, then you can even go to cords mode! Install at once.
4 stars: Piano mode works fine and is very helpful when I need to get pitches quickly and don't have an actual piano nearby. Multiplayer game is awful. Maybe there is a way to connect to an actual keyboard? Otherwise there's no way to actually hit all the notes. Edit: changed from 3 to 4 stars because I find the piano mode so useful when I need to find pitches on the go.
4 stars: Overall, probably the best Piano app on mobile. Wonderful for learning songs if you don't have access to a piano. I have two issues with it though. 1. When using a different sound other than normal Pianos, sounds like the Music Box sometimes make an extremely reverbed and annoying sound when playing. 2. Having a MIDI file is basically useless in my eyes, as there is no instructions on how to use it in this app.
3 stars: Good app, But there's a bug I came across. Basically I was in piano circle about to post something, After I finished writing the description I attempted to post it, But when posting it it would be at 94/95% and stuck there, After a couple minutes or so it would say
3 stars: Good app for ...