5thsFlow - Circle of 5ths
Music Theory & Chord Builder
$4.99 · Designed for iPad
Stop guessing, start hearing. Every chord, mode, and key — tap it, hear it, understand it. Music theory finally makes sense.
5thsFlow is an interactive Circle of Fifths built for musicians, songwriters, and producers who want to understand music theory — not just memorize it.
Tap any key on the wheel and instantly see its 7 diatonic chords, 7 modes, key signature, and relationships to every other key. Hear everything played back in real time with a warm, piano-style tone.
EXPLORE ANY KEY
• All 7 diatonic chords with Roman numerals, chord function, and quality
• Toggle between major and relative minor — see Am as i, F as VI, and so on
• 7 modes arpeggiated so you can hear their character: Dorian, Phrygian, Lydian, and more
• Key signature, scale degrees, relative minor, dominant, and subdominant at a glance
• Transpose up or down by semitone without losing your place
CHORD VOICINGS & EXTENSIONS
• Switch between Triad, 7th, Sus2, Sus4, and Add9 voicings for every chord
• Hear exactly how extensions change the feel of a chord — from open and suspended to rich and jazzy
• Borrowed chords from the parallel minor shown in every major key — modal interchange made visual and playable
BUILD PROGRESSIONS
• Add chords from any key into a sequencer
• Set your BPM, toggle loop mode, and play it back
• Save named progressions and reload them any time
• Works across keys — mix chords from different keys in one progression
FIND YOUR KEY
• Know your chords but not the key? Tap them in and matching keys appear instantly
• Or hold your phone up to an instrument — the mic detector listens and ranks the most likely keys by confidence in real time
SOUNDS GREAT
• Block or Strum chord playback style
• Play the classic I–IV–V–I progression or the i–VI–III–VII minor progression with one tap
• Haptic feedback that matches chord quality — major, minor, and diminished each feel different
Whether you're a beginner learning which chords go together or a working musician who needs a fast reference on stage, 5thsFlow is the fastest path from question to answer.
Designed for iPhone and iPad.
Improved audio reliability — Fixed an issue where sound could stop working after using the key detection feature, particularly when Bluetooth headphones are connected.
The developer, James Roche, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- James Roche
- Size
- 8.8 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © James Roche
