Bent Spool vs yawp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bent Spool
This music app offers creative audio effects for live performance or use within other music apps. Explore rhythmic tremolo, pitched repeats, and looping fragments of your audio. It includes built-in overdrive and tape effects for unique sound shaping.
- Rhythmic tremolo effects
- Pitched repeat sequences
- Overlapping audio loops
- Built-in overdrive and fuzz
- Vintage tape effects
- Standalone and AUv3 host support
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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.
yawp
Create unique electronic music by drawing simple shapes that generate synthesized loops. Explore a variety of instruments and visualizers, and even control it with hardware. Share your creations as stereo mixes or individual stems.
- Draw hills to generate synthesized musical notes
- Twenty-two unique synthesized voices
- Offline functionality and instant loading
- MIDI controller support for hardware integration
- Export music as stereo mixes or individual stems
- Record and chop external audio into instruments
- Visualizers that react to the music
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yawp is an instrument made of loops. Draw a hill over a voice's line and the machine sows the notes. Every voice is a loop with its own length, so the loops drift apart and come back — minimal techno and ambient fall out of that drift on their own. There is no wrong way to draw a hill. TWENTY-TWO VOICES, ALL SYNTHESIZED A felt kick, a brushed clap, delicate hats, a walking electric bass, a felt piano, soft minor chords, vocal chops cut from an imagined take, a tine piano whose long tails stack into chords nobody wrote, an octave organ, a tape-hungry wash, a pluck that scatters light, and more. No samples anywhere — the whole app is synthesized live, loads instantly, and works offline. EVERY VOICE UP CLOSE Tap the mark above a voice to open it. Its line, its notes, its sound, its wave, its envelope and an LFO each get their own page, and you change the sound by dragging its picture. Every voice has presets, and you can keep your own. THE DICE Tap the die and it deals the band one piece of music with a section in mind: an open groove, a thinned intro, a break, breakbeats shaped by the tempo, or the strict sixteenth hand. Hold it for a whole new song in one style: tempo, key and scale, who plays, the sound each voice wears and every loop. Keep what you like, redraw the rest. SCENES Watch the song as moving line art: a beacon on a plain, a sea behind glass, breathing tissue, a vessel of light. Swipe to the next one. Watching only — the music does the moving. PLAY IT FROM HARDWARE Plug in a MIDI controller: knobs ride the macros and the tempo, pads mute voices and launch your kept sets on the next bar, keys set the song's key or play notes into a loop. Four MIDI lanes play your own synths and drum machines, and yawp sends its clock. Ableton Link keeps yawp in time with other apps and devices on the same Wi-Fi. INSIDE OTHER APPS With yawp complete, yawp is also an AUv3 plugin for AUM, GarageBand, Logic and other hosts. Load it as an instrument with its own sound, or as a MIDI version that plays every loop as notes into your synths. HAND IT ON Keep sets with their band, mix and key. Share a set as the stereo mix, a stem for every voice and one MIDI file — 32 bars from the same downbeat, ready to drop into any DAW. AND · tap a step to pin or silence it · drag a loop's end to change its length — odd meters are the same gesture · record up to ten seconds of anything — the mic, a headset or an audio interface — and chop it into an instrument · retune the whole song like a tuner (yawp · key A) and choose its scale · mix with hairline faders, mute and solo · record up to ten minutes of the mix and keep the take Most voices and scenes are free. Packs of two voices are one-time purchases, never a subscription. yawp complete unlocks everything: every pack to come, the mixer's performance pads, the song's curves and the AUv3 plugin.
Screenshots
Verdict
The clearest difference is update cadence: Bent Spool at daily against yawp's every 2 days. yawp's advantage is iOS requirement (15.0 vs 17.0). On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Bent Spool sells 1 one-off in-app purchase and yawp sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Bent Spool against 5.0 for yawp. Both are backed by a comparable volume of ratings — 5 and 4 respectively.
Bent Spool ships an update daily, yawp every 2 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.
| Parameter | Bent Spool | yawp |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) | 5.0 (4 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 5 — better | 4 |
| Update frequency | Daily — better | Every 2 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Plastic Factory LLC | Kuta Tsuchikawa |
Customer experience
Bent Spool
yawp
In-app purchases
Bent Spool
- Bent Spool Unlock$9.99
yawp
- wood$2.99
- air$2.99
- song$2.99
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- windows$2.99
- glass$2.99
- fog$2.99
- yawp complete$19.99








