One Loop vs Poly 2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
One Loop
This app provides a 10-track loop station for musicians to create backing tracks and record musical ideas. It features studio-quality effects, advanced layer control, and MIDI support for hands-free performance.
- 10-track loop station
- Studio quality effects (EQ, Compression, Reverb)
- Advanced layer control and grouping
- Metronome with percussion
- MIDI support and mappable controls
- External audio interface support
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One Loop is a 10-track loop-station designed for singers, songwriters & instrumentalists. Whether you want a personalised backing track, or need to record an idea for your next big hit, One Loop brings performance and recording straight to your phone. Features: • Simple, easy to use looping. • Built-in studio quality effects: Noise Gate, EQ, Compression & Reverb. • Advanced layer control and grouping. • Metronome selection with a variety of backing percussion. • MIDI support and mappable control for hands free performance. • Supports external audio interfaces; up to 8 channels of audio input. Recording Whether you choose your device’s built-in microphone for quick and easy use, or an external interface for multiple routing options, One Loop encourages portable creativity. Don’t be restricted by the limitations of a computer when all you need is your phone… and something to record! Enjoy the app’s seamless looping and build up to 10 beautiful layers with ease. Save your projects for later reference, you’ll never forget those 3am ideas ever again! Make sure to wear headphones for clean recordings with no feedback issues. Complete Control One Loop gives you complete control to form your best ideas. Each layer is mute-able and has an adjustable volume slider to shape your overall sound. Assign each layer to a bank of 4 groups (A to D) for quick variation of instrumentation, or different sections of a song. Setup your Bluetooth or USB midi devices and assign their parameters to trigger any of One Loop’s functions for greater control and smooth performances. Manage Your Mix One Loop gives you the controls to refine your recordings with studio quality effects designed by audio engineers: Noise Gate, EQ, Compression and Reverb. Wherever you’re recording, either in a quiet room or a busy outdoor environment, you can reduce any unwanted noise by adjusting the Noise Gate’s threshold and envelope, to create cleaner recordings. Boost or Cut the Input’s EQ frequency bands (Low, Mid and High) with a +/- 15dB range to shape the sound of your loop layers. Adjust the acoustic environment of your mix, from a small garage to a large cathedral, by changing the size & effect percentage of the Reverb. Settle a busy, complex layered mix using the Bus Compressor’s threshold and ratio controls.
Poly 2
This app generates evolving musical patterns and melodies using polyrhythms. It offers extensive sound manipulation with a sampler, multiple effects, and the ability to store numerous configurations. Users can also import their own sounds and integrate with other music production tools.
- Generative polyrhythm sequencing
- Up to 8 simultaneous sounds
- Sampler with envelopes and filters
- Randomize capabilities
- Built-in delay, reverb, distortion, and EQ FX
- AUv3, Audiobus, and IAA support
- Import custom samples
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Poly 2 is a generative sequencer that creates evolving patterns and melodies based on the power of polyrhythms. Check out the promo video: https://youtu.be/ovCXtBynEkw Features: - Up to 8 different sounds at any time - Store up to 16 different configurations for each project - A sampler that includes envelopes, filters, loop crossfading, an LFO and more - Randomise capabilities - Delay, reverb, distortion and EQ FX - Over 100 samples included for free - 13 premade collections of sounds - 13 example projects - AUv3 support, both MIDI and Audio - Audiobus and IAA - Ableton Link - MIDI notes in / out, MIDI CC in / out and MIDI clock in - Import your own samples via iOS Files or WIFI transfer
Screenshots
Verdict
The clearest difference is rating: Poly 2 at 4.8 against One Loop's 3.9. Poly 2 also leads on review sentiment (84% vs 60%) and ratings volume (686 vs 19). One Loop's advantage is iOS requirement (11.0 vs 16.6). On price, update cadence, ads and in-app purchases 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. One Loop sells 1 one-off in-app purchase and Poly 2 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Poly 2 holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Poly 2 has 686 ratings behind it against 19, so its average is the more settled of the two. Written reviews point the same way: 60% of One Loop's written reviews are positive against 84% of Poly 2's.
One Loop ships an update every 5 weeks, Poly 2 every 4 weeks. The most recent releases landed on September 23, 2026 and October 8, 2026 respectively.
| Parameter | One Loop | Poly 2 |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (19 ratings) | 4.8 (686 ratings) — better |
| Positive reviews | 60.0% of reviews | 84.1% of reviews — better |
| Number of ratings | 19 | 686 — better |
| Update frequency | Every 5 weeks | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 77 MB | 153 MB |
| Age rating | 4+ | 4+ |
| Developer | Caelum Audio | James Milton |
Customer experience
One Loop
Poly 2
Bugs and requests
One Loop
Not enough reviews yet to summarise bugs or requests.
Poly 2
Reported bugs
3 issues- In-app purchase not working for some users
- MIDI connectivity issues with certain apps
- Crashes upon opening for some users
Requested features
8 requests- Ability to preview samples before importing
- Autoslice/autochop functionality for samples
- Support for larger sample imports and automatic slot filling
- Granulizer effect
- Note repeat and vinyl effects
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- More built-in effects and processing options
- Ability to create and arrange full songs
- M1 Mac compatibility
In-app purchases
One Loop
- Full App Unlock$3.99
Poly 2
- Pro mode$11.99









