EarGuru

Only you can do the work of serious ear training. EarGuru helps you do it with three independent modes, each targeting a specific area.
In LISTEN mode, EarGuru plays a group of notes, all different, and you try to identify them from lowest to highest. Beginners will want to start with 1, then move to 2. Experts can go all the way to 11 notes if they choose to.
In PLAY mode, EarGuru plays a note, or a chord of up to 4 notes, and you play it back as quickly as possible on your instrument before it moves on to the next one.
In SING mode, EarGuru asks you to sing a note, and as you're singing, EarGuru plays the note so that you can make sure you've sung it correctly and in tune.
All three modes can be used without looking at the screen, using the CONTINUOUS PLAY mode.
This app relies on you, as a serious musician, to self-evaluate. If used regularly, it can completely transform your hearing.