Guitar Gravitas is a comprehensive and interactive music application that provides an extensive chord, arpeggio, and scale library for guitar players. It is suitable for all levels of guitar players, from beginners to professionals. The app is available for iPhone users, and it is developed by Mad Harmony Inc.

The app has over 200 chord types, including a library of 15,000 commonly used chord shapes and millions of playable shapes generated by an advanced algorithm. The app also offers thousands of arpeggio patterns and over 1000 different scales from all over the world, including thousands of patterns.

Guitar Gravitas also offers 31 video guitar lessons, backing tracks, tutorials, and support documents in PDF format. It includes a high-precision guitar tuner, metronome, and over 200 predefined guitar tunings, with the possibility to create custom tunings. The app allows you to interact and listen to how chords, arpeggios, and scales sound. Additionally, it comes with chord, arpeggio, and scale finders where you can select notes on the fretboard to find out what you are playing.

Overall, Guitar Gravitas is an excellent application for guitar players who want to improve their skills and knowledge.