Fretionary Bass

Bass Guitar Fretboard Theory

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

See exactly what to play over any chord. Bass players don't read chord diagrams — you read changes. You're handed a progression and the only question that matters is: which notes lock with this chord, and where do they sit under my hand? Fretionary Bass answers that instantly. Pick a root and a chord, and the strong notes — root, 3rd, 5th, and 7th — light up across your entire neck, color-coded so the tones that define the chord jump right out. The matching scale sits dimmed underneath, so your safe notes are always in view. It's faster than thinking, and it's built for bass: your string count, your tuning, your hand position. THE CHORD-TONE OVERLAY • Root, 3rd, 5th, and 7th lit up in distinct colors across the whole neck • The suggested parent scale dimmed underneath — toggle it on or off • Lock a 4-fret window to see exactly what falls under your hand • Tap any note to hear it — real bass samples, pitched to the note • Interval labels (R 3 5 7), note names, or none YOUR BASS, YOUR TUNING • 4, 5, and 6-string necks — the whole fretboard follows your tuning • Standard, Drop D, low-B 5-string, 6-string, and more • Every overlay, scale, and arpeggio recalculates for your instrument MORE ON THE NECK • Scales and modes mapped across the fretboard, color-coded by interval • Arpeggio view — chord tones only, the bass staple • Custom mode — highlight any set of notes you want • Built-in metronome for tight practice • A daily scale or chord pick, plus a practice streak to keep you sharp WORKS ANYWHERE • Fully offline — no account, no sign-up, nothing leaves your device • Clean, fast, dark interface made to glance at mid-song Start free with the core overlay, essential scales, and standard tuning. Unlock everything — all chords and 7ths, every scale and mode, all tunings, and custom mode — with Fretionary Bass Pro (monthly, or a one-time lifetime purchase). Stop guessing the changes. Start locking in. Privacy Policy: https://fretionary-bass.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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Added practice modes Added hints/help for each mode Touching notes on the fretboard triggers sound for each note

Version 1.1.3

The developer, Brandon Sumner, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Purchases
    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Brandon Sumner
Size
  • 55.6 MB
Category
  • Education
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPad
    Requires iPadOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
  • Fretionary Bass Pro Lifetime $44.99
  • Fretionary Bass Pro Monthly $7.99
  • Learn More
Copyright
  • © 2026 Renmus Software LLC
  • Privacy Policy

    • More by Brandon Sumner

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