Fifth Music Theory
Music theory app
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$0.99
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About
Fifth has an intuitive UI based around the circle of fifths. Drill notes, intervals, chords, and modes in any key.
Set practice reminders to build the habit and pick up music theory quickly and easily.
Use explore mode to see what notes are in a given key, how to form specific chords from those notes, and how the attributes of a key fit together.
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What's New in Fifth Music Theory
7.1.0
October 30, 2026
• Fixed a crash that could happen when opening the app • Practice reminders now arrive on the right day • Corrected chord spellings in several keys, including G# minor and secondary dominants • Fixed flashcards: the last card in a deck is reachable again, and empty decks no longer crash • Updated for the latest iOS
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