Many musicians want to improve their musical ear on the move, using mobile apps. Whether you prefer an iOS (iPhone, IPod, iPad) or Android phone or tablet, there will be many music learning apps which can help you train your ear.
Many ear training apps assume that intervals and chords are all there is to ear training, but of course that isn’t the case. Developing your relative pitch skills with interval and chord ear training is a good starting point for many musicians, but if you find an app which claims to be an “all-in-one” ear trainer, the chances are it’s only actually teaching one or two skills.
Try searching your app store for “music”