https://trainer.thetamusic.com/ https://trainer.thetamusic.com/ This is a really nice app that takes you through a lot of music theory. I would recommend using

https://trainer.thetamusic.com/ https://trainer.thetamusic.com/ This is a really nice app that takes you through a lot of music theory. I would recommend using it with a good pair of headphones though.