AppPage.net

Screenshots

  • Bent Spool screenshot 1
  • Bent Spool screenshot 2
  • Bent Spool screenshot 3
  • Bent Spool screenshot 4

About Bent Spool

Bent Spool is a creative effect that can transform simple musical parts into unexpected rhythms and melodies, played live or as an effect in your favorite host app. Shape a tremolo pulse, turn a note into a run of pitched repeats, or build a moving layer from fragments of what you just played. Drive the input with built-in overdrive or fuzz, add a core effect, then finally layer in vintage analog tape effects. THREE MODES TREM: a pulsing volume effect, from a rounded sine through triangle and sawtooth to a hard square gate. Syncs to your host's tempo or runs free. REPEAT: up to 64 pitched copies with their own decay and feedback, across five pitch stations from two octaves down to two octaves up. LOOPS: up to six overlapping fragments of your recent audio, spread across pitch, direction, read position and the stereo field. CHARACTER CHAOS adds movement that suits each mode: octave jumps in REPEAT, held or stalled pulses in TREM, wandering reversals and pitch drift in LOOPS. WEAR adds tape wear, magnetic saturation and digital crush after the active mode. At the input, OD is a softer clip; FUZZ is a harder distortion that sputters as it decays. PRESETS 48 factory presets: 10 TREM, 15 REPEAT, 15 LOOPS and an 8-preset Fuzz Tremolo pack. Unlock to save your own. FREE TO TRY TREM plays in full on the OD voice with ten presets. No time limit, no interruptions. A single $9.99 in-app purchase unlocks REPEAT, LOOPS, FUZZ, the rest of the presets and preset saving. No subscription. Runs as a standalone app or as an AUv3 effect in AUM, Loopy Pro and other AUv3 hosts, on iPhone and iPad.

Ratings & reviews

5.0

5 ratings

5 ★ 100% 4 ★ 0% 3 ★ 0% 2 ★ 0% 1 ★ 0%

What’s new

Version 1.0.4 · Updated October 12, 2026

Controls are more reliable: fixed an intermittent problem where a control, most often the mode switch, stopped responding until a preset was changed. Swipe the mode switch: slide along it to move between TREM, REPEAT and LOOPS, as well as tapping. Knobs follow your finger: drag up or right to turn a knob up, down or left to turn it down, so a swipe no longer has to be straight up and down. Octave direction for LOOPS: a new DIRECTION switch on the back panel sends the voices up only, down only, or both ways. Up only keeps every voice at or above the original pitch, so low octaves no longer muddy the sound. Triplet sync: 1/16T, 1/8T, 1/4T and 1/2T note lengths in every mode when SYNC is on. In wide host windows, such as AUM on a larger iPad, the pedal now sits centred instead of hugging the left edge.

App privacy

The developer, Plastic Factory LLC, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to Bent Spool

Looking for apps like Bent Spool? Here are 6 similar apps on the App Store. The highest rated is Undersong (5.0/5), and 2 of the 6 are free to download.

Bent Spool vs. alternatives
App Rating Price Last updated Compare
Bent Spool 5.0 / 5 (5 ratings) Free October 12, 2026
Vascular - Tactile Synth 4.9 / 5 (8) 3.99 USD Oct 12, 2026 Compare
The Remnant - Drone Synth 4.2 / 5 (5) 5.99 USD Oct 2, 2026 Compare
Undersong 5.0 / 5 (11) 9.99 USD Oct 16, 2026 Compare
Braindance - Glitch Effects 5.0 / 5 (5) 4.99 USD Sep 26, 2026 Compare
VoltageControl – Free Oct 15, 2026 Compare
Sampledex Effect Shift 5.0 / 5 (2) Free Oct 2, 2026 Compare

Compare Bent Spool with the top alternatives: ratings, updates, ASO score and keyword gaps →