# Bent Spool — Tremolo, Repeat, Loops FX > Creative audio effects app for music production and live performance. (iPhone/iPad app by Plastic Factory LLC.) - Source: https://appshunter.io/ios/app/bent-spool/id6811386417 (this page in markdown: same URL + `.md`) - Developer: [Plastic Factory LLC](https://appshunter.io/developer/1017920807) - Category: Music - Price: Free with in-app purchases - Rating: 5.00/5 from 5 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 23 MB - Languages: American English - Released: 2026-10-09 - Data updated: 2026-10-15 - Monetization: free with in-app purchases ## What is 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. ## Key features - Rhythmic tremolo effects - Pitched repeat sequences - Overlapping audio loops - Built-in overdrive and fuzz - Vintage tape effects - Standalone and AUv3 host support ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Bent Spool Unlock | $9.99 | one-time | ## Is Bent Spool safe? Not enough ratings yet to assess Bent Spool. ## Is Bent Spool legit? Bent Spool appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Bent Spool is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Frequently asked questions about Bent Spool ### What is Bent Spool? Bent Spool is a creative music effect app that transforms audio with tremolo, pitched repeats, and looping features. It can be used as a standalone application or as an AUv3 effect within compatible music hosts. ### What are the main modes in Bent Spool? Bent Spool features three primary modes: TREM for volume pulsing, REPEAT for pitched delays up to five stations, and LOOPS for creating overlapping fragments of recent audio. ### Can I save my own presets in Bent Spool? Yes, you can save your own custom presets in Bent Spool. This feature is unlocked with the one-time in-app purchase. ### What devices does Bent Spool support? Bent Spool is compatible with iPhone and iPad devices, running as a standalone app or within AUv3 hosts. ### How much does Bent Spool cost? Bent Spool is free to try, with the TREM mode and ten presets available without charge. A single $9.99 in-app purchase unlocks all features, including REPEAT, LOOPS, FUZZ, additional presets, and preset saving. ### Does Bent Spool have ads? No, Bent Spool does not contain advertisements. The app offers a free trial and a one-time in-app purchase for full functionality. ### How often is Bent Spool updated? Bent Spool was last updated on October 12, 2026, with version 1.0.4. The release date was October 9, 2026, indicating recent development activity. ### What is the age rating for Bent Spool? Bent Spool has an age rating of 4+, making it suitable for a wide range of users interested in music creation and audio effects. ## Version history (last 4 releases) ### 1.0.4 — 2026-10-12 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. ### 1.0.2 — 2026-10-11 Play more than one control at once: multi-touch now works, so you can turn two knobs together. Trackpad support: on an iPad with a trackpad, a two-finger scroll over a knob turns it. Fixed the FRONT button on the back panel when Bent Spool runs in a wide window, such as in AUM on a larger iPad. Tapping it now flips back to the front. ### 1.0.1 — 2026-10-10 Smoother REPEAT: sweeping TIME with SYNC off no longer zippers, and the free TIME knob now moves evenly across its travel. The Unlock button updates as soon as a purchase or restore completes. Cleaner launch screen, plus a graphics memory fix when closing the plugin window. ### 1.0 — 2026-10-09 No release notes. ## More apps by Plastic Factory LLC - [Grainsmith Field](https://appshunter.io/ios/app/grainsmith-field/id6760624826) - [Particle Chimes: Ambient Synth](https://appshunter.io/ios/app/particle-chimes-ambient-synth/id6785981783) All apps by Plastic Factory LLC: https://appshunter.io/developer/1017920807 ## Related topics [tremolo](https://appshunter.io/ios/topics/tremolo) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-15.*