Bent Spool vs Vibrain Waves
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.
Vibrain Waves
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Vibrain V1 is a complete audio environment for creating, shaping, processing and enjoying sound. A beautiful music player and a full studio in one app, and every feature runs entirely on your device. When you listen, it's your player. When you produce, it's your studio. THE PLAYER • Smooth playback of the music on your device and any audio files you import • Full-screen player with a live audio visualizer • Vibe Rain: an immersive, glowing rain mood that moves with your music • 8D audio for a sound that travels around your head • Tempo and pitch control, changed independently • Advanced Studio Mixer: 12-band equalizer with genre presets, plus echo, chorus, flanger, distortion, tape saturation, bit crusher, lo-fi and stereo width • Playlists, favorites, shuffle and repeat, and tag editing with artwork • Lock screen and Control Center controls THE STUDIO TOOLS • Studio: a multi-track editor to arrange, trim and mix your audio, then export • Advanced Studio: a professional DJ-style mix with a full effects rack and live mic recording • Vocal Booth: record your voice over a backing track with on-device noise reduction • Instruments: a playable piano keyboard and drum pads, with MIDI import • Mixer Pads: a loop pad grid for building beats • Format Studio: convert audio between formats and extract audio from files • Music Notation: open sheet music files and see them engraved, offline • Smart Library: on-device analysis of your songs to help you organize them LOCAL CAST Host a listening session and invite up to 7 guests, so up to 8 devices play together on the same Wi-Fi. iPhone, iPad and Mac can all host or join, in any mix. Guests can request songs, and anything they want to keep needs your approval. It is device to device on your own network. Nothing goes through a server. MADE FOR EVERY SCREEN Vibrain adapts to iPhone, iPad and Mac, in portrait and landscape. WHY OFFLINE MATTERS Playback, effects, recording, conversion and sheet music all run on your device. Your music and recordings never leave it unless you choose to share them with another Vibrain device on your own Wi-Fi. No account, no sign-up, no cloud. PRIVACY, PLAINLY No ads. No tracking. No selling data. Crash reports and an anonymous count of active users are off by default and only turn on if you say yes. You can change your mind anytime in Settings. Create. Process. Perform.
Screenshots
Verdict
The clearest difference is in-app purchases: Vibrain Waves at none against Bent Spool's 1. On price, ads, device support and iOS requirement 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. Vibrain Waves asks for nothing beyond the download.
| Parameter | Bent Spool | Vibrain Waves |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Number of ratings | 5 — better | — |
| Update frequency | Daily | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 27 MB |
| Age rating | 4+ | 9+ |
| Developer | Plastic Factory LLC | TecHub |
In-app purchases
Bent Spool
- Bent Spool Unlock$9.99
Vibrain Waves
No in-app purchases









