Kids Ear Training (by mDecks Music) has been designed for kids 9+ that are already studying a music instrument or in choir.
This is a huge app containing more than 200 levels and exercises, including:
Essential sound concepts such as: Low vs. High pitched. Acending/ descending/ constant pitch, etc. Fun elements recognition such as: animal sounds, instruments and instruments families (Brass, Woodwinds, Strings…) Movable Do (relative pitch) vs. Perfect pitch: Solfege, Kodaly Signs, Perfect Pitch by note name/ music notation (test if you can develop perfect pitch and learn relative pitch with ease)
All Intervals: Major, minor, Perfect, augmented, diminished Intervals are presented alone and in context All Triads: Major, minor, augmented, diminished. Triads are presented alone and in context
Basic music knowledge or teacher assistance may be required since theoretical concepts are not explained in detailed.