Scale degrees
Gaps will play a drone note and then scale degrees on top of it. You'll need to recognize the sound of each degree and play it back on your guitar.

Gaps is an ear training tool that listens to what you play on guitar. It will help you train your ear and your fretboard visualization skills simultaneously.
Gaps will play a drone note and then scale degrees on top of it. You'll need to recognize the sound of each degree and play it back on your guitar.
Gaps will play a short succession of notes and you'll need to play them back correctly.
Gaps will play intervals, show their root note position on the fretboard and wait for you to play them back.