ModusCycler — Modi & Jamming
Jam Session Builder & Skalen
$17.99 · Designed for iPad. Not verified for macOS.
Above every fretboard, one sentence tells you what you play — scale, root, chord tones and character notes, coloured to match the dots on the fretboard.
Turn chord progressions into music you understand. ModusCycler shows you the matching church modes and scales for any progression — on fretboard, TABs, piano and standard notation — and backs you up with a complete jam band.
JAM SESSION BUILDER
Build your own backing track in seconds: tap chords into the bar grid, get piano accompaniment with musical embellishments (a statistical improviser based on Chopin and Beethoven statistics), plus a precise metronome with swing — hit Play and jam.
Launch offer: everyone who joins in the first 6 weeks keeps the Jam Session Builder free forever — afterwards it is a €19.99 in-app purchase.
NEW: ESCALATOR — SCALE REFERENCE & SLIDES
All seven positions of the major scale as a printable Kiltz/CAGED and 3NPS reference, now right inside the app. The transitions trainer connects positions with slides — and the new out-of-scale slides reveal the pros' trick: change the entire scale family with ONE shape, using a slide formula like "C, 2 frets down and back". You always land on a chord tone, fingering included.
NEW: CHEATING CHEAT SHEET WITH SCALE-CHANGE COMBOS
Two linked wheels per chord: church mode and scale in shorthand. Below, every mode combination of your progression sorted by effort: no change, one change (there and back) or two — each with its slide formula. Pin chords to keep them fixed; the eScalator opens right with the matching keys.
SCALES FOR IMPROVISATION TUTOR
The modes·explorer derives church modes step by step on the fretboard: choose a position, understand the mode, play the scale. With Kiltz/CAGED boxes and all seven 3-notes-per-string patterns.
FOR EVERY MELODIC INSTRUMENT
ModusCycler shows you which notes fit over the chords — in standard notation and by note name, playable on any instrument. Ideal for improvising and melodic accompaniment on saxophone, clarinet, flute, trumpet, violin, xylophone, vibraphone, accordion, harmonica or voice. Fingering diagrams cover guitar and piano; the scale theory applies to all.
MORE FEATURES
- Fresh tile design: four approaches (Global, Smart, Flexible, Cheating) and four views (fretboard, TABs, piano, notation) at a glance
- Build progressions: wheel picker, modal interchange table, circle of fifths, song database
- Smart analysis: matching modes with percentage ranking and character descriptions
- Undo for chords and modes, key-change dialog with pin
- Stage view: all scale diagrams full-screen — print-quality, with a transport bar
- Notation with correct key signatures, deviations shown with accidentals
- Real piano samples, metronome with sounds and swing
- Tutorials: bird's-eye overview + 12-step tour, extensive online manual
- 6 languages: English, German, Spanish, French, Italian, Norwegian
For everyone who improvises, accompanies flexibly or finally wants to understand modes — guitarists, pianists, wind and brass players, string players, singers, songwriters and producers.
TRY THE FULL VERSION FOR FREE
On app.moduscycler.com the complete full version runs free in your browser for one day — after that it continues there with limited features. Try everything before you download the app.
Looking for modes, church scales, improvisation or jamming? ModusCycler (also "Modus Cycler") brings you scales, modes and chords for your next jam session — improvise on guitar, bass, piano and every melodic instrument.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
ModusCycler finds the matching mode for your chord progression, shows the scale on the fretboard and builds the jam track to match.
New in 0.7.5:
- Understand modes: Above every fretboard you now get one sentence telling you what you play — scale, root, chord tones and character notes, coloured to match the dots on the fretboard
- Jam: A new session sounds finished right away — cello bass and piano come preloaded
- Stay in time: Click and chords start together and no longer drift apart when you switch instruments
- Cheating: One tap arms the wheel, a second one ends the turning
- Shapes: Positions 4E and 4A were missing a note on the G string — fixed
- New app icon
www.moduscycler.com
The developer, Robert Ulrich Seidel Dr, 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
- Robert Ulrich Seidel Dr
- Size
- 52.6 MB
- Category
- Music
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 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.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Robert Seidel
