Anacru: Complex Rhythm Studio
by Songdeed
Only for iPhone
$4.99 · Designed for iPhone. Not verified for macOS.
iPhone
Construct advanced rhythm by ear and eye: metric modulation, interlocking polymeters, phase shifts, and nested tuplets — with live playback and MIDI export.
Anacru is a scratchpad for constructing advanced rhythm.
Most rhythm apps measure time — Anacru builds it. Instead of tapping along to a
click, you assemble the rhythm you're hearing in your head from its parts:
interlocking meters, tempo modulations, phase shifts, and tuplets nested inside
tuplets. Then you play it back, watch it move, and export it to your DAW.
Built for composers, drummers, producers, and teachers who work past 4/4 — and for
students trying to finally *feel* how these ideas fit together.
WHAT YOU CAN BUILD
• Polymeter — stack independent layers, each with its own meter, subdivision,
accent pattern, and phase offset. Watch 5/4 drift against 4/4 and snap back into
alignment, locked to one shared pulse.
• Metric modulation — pick the note value before and after a tempo change and get
the exact new BPM instantly, with the direction never ambiguous. Chain modulations
into a timeline the playback steps through as it loops.
• Nested tuplets — put a quintuplet inside a triplet inside a bar. The engine handles
the math; you just stack them.
• Phase & accents — tap a pulse to accent it, or drag a layer's ring to rotate its
phase. The wheel is the instrument.
THE INTERACTIVE WHEEL
Every layer is a ring of pulses on a single wheel, color-coded and voiced so you can
follow each stream by eye and by ear. A playhead sweeps the cycle so you can see the
relationships, not just hear them.
HEAR IT PROPERLY
Each layer gets its own pitch, stereo position, and selectable voice — woodblock,
marimba, pluck, sine, or a kick/hi-hat drum kit — so interlocking parts read as
separate instruments instead of one wash.
SEE IT NOTATED
Each layer is rendered on its own staff with correct meter, beaming, accents, and
tuplet brackets.
TAKE IT WITH YOU
• Save and recall your patterns on-device.
• Export a MIDI file — a clean tempo map carrying your modulation timeline, plus one
track per layer — and drop it straight into any DAW.
PRIVATE BY DESIGN
No account. No sign-up. No tracking. No internet required. Everything lives on your
device. One purchase, yours to keep.
Ratings & Reviews
-Interface polish
-Now type tempo in directly in conjunction with slider
The developer, EVAN TRACEN POWERS, 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
- Songdeed LLC
- Size
- 5 MB
- Category
- Music
- Compatibility
Requires iOS 15.6 or later.
- iPhone
Requires iOS 15.6 or later. - iPod touch
Requires iOS 15.6 or later. - Mac
Requires macOS 12.5 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 Songdeed LLC
