This is a game good for drilling note names and fingerings for all instruments.

This is my recommended free metronome app. You can also search metronome on Google and an adequate metronome will pop up! Metronomes help musicians maintain a steady beat and help them to be more aware of when they fluctuate from the given tempo.

This is my recommended free tuner app. It is excellent for musicians to have open on their stand while they are practicing. When long notes are played, it will help them to dial in their intonation.