The Guitar Scales Trainer app is a comprehensive tool for learning and practicing guitar scales. All modes are included as are pentatonic and blues scales. You can view the notes of any scale in any key.

The app is easy to use and navigate. Choose a key and scale type and see the notes all over the neck. If you want to practice soloing over a particular chord, select the chord name and type from the dropdown and see how the chord tones relate to the chosen scale.