THIS is the ear training app you want. – goodEar Intervals - Ear Training Review

If you’re trying different ear/interval/pitch/harmony training apps, don’t go any further without trying goodEar. Your search will likely end right here. After experimenting with nearly every app of this kind (both free and paid), I have found goodEar to be the most effective of its kind. It is one of the only training apps that gives you a keyboard to visualize and input your responses instead of pressing labeled buttons. This engages the eyes and spatial recognition by showing the user the distance between pitches on the keyboard instead of hearing them only in their head, and also gains some familiarity with a piano keyboard for the user if they’re not already experienced or proficient. The app is focused and streamlined, without too many options or features that clutter the interface, and the user can easily and quickly customize and expand their exercises without being constrained by a required plan. The layout is easy to understand, since the app is refreshingly free of pointless options and preferences and offers only those customizations that serve a purpose and new challenge to the user. A very well-thought out and judiciously planned app. Will speed the user’s learning unlike any other on the App Store.
Review by MF_for_Apple on goodEar Intervals - Ear Training.