This app certainly has the potential to be the best ear training app out there (as well as an incredibly useful tool for all musicians) but one main problem (that can be easily fixed) serves to currently squash all those hopes. When using the app, regardless of whatever ear training exercise youre doing (intervals, scales, chords) itll usually give you 4 selections to choose from. However it NEVER repeats!!!! Meaning, when it randomly selects one of the 4 intervals, scales, or chords for you to decipher it wont randomly choose that same interval scale or chord immediately after, and thats extremely annoying, pointless, and only serves to single handedly defeat any true purposes of ear training. Because its not truly random (as it obviously should be) and I inherently know an answer will never repeat, instead of always using my ear I cant help but deduce the right answer by simple logic. And this DEFEATS the sole purpose of ear training which is to train you TO USE YOUR EARS!!! PLEASE PLEASE PLEASE FIX THIS!!! I really like this app, aside from that, and if that was fixed this would be an amazing and incredibly useful tool as well as something every musician and music student should own. I currently cant recommend it tho when I cant even use it myself, when it doesnt benefit me at all or train my ears. Often what happens is there are four answers (intervals like 2nd, 3rd, 4th 5th) and I hear the interval and deduce its obviously a 4th (as an example) because its a high interval and the last interval was a 5th and cant repeat. It totally makes the app completely useless!!! Hopefully youll fix this because this app would be something Id recommend to every musician and music student (ie: all my friends and students).