Soi vs Polybeep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Soi
Create and improvise music with others in real-time. This expressive instrument allows groups of any size to perform together, automatically harmonizing and synchronizing participants for an engaging experience where there are no wrong notes.
- Real-time music creation
- Group improvisation
- Automatic harmonization
- Participant synchronization
- Ensemble performance
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Become part of the magic of creation and improvisation. Join in with friends, family, or anyone and make music together. Soi is an expressive instrument that allows for a group of any size to perform as an ensemble. Soi automatically harmonises and synchronises each of the participants to help everyone to feel engaged. There are no wrong notes!
Polybeep
Create unique music with a polyrhythmic sound machine. Record or load samples, arrange them into looping shapes, and apply various effects. MIDI input is supported, and songs can be exported as WAV files.
- Polyrhythmic sound generation
- Record microphone audio
- Load sample files
- Looping shape arrangement
- Extensive audio effects
- MIDI input support
- Export to WAV
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From the creators of DefleMask and Minimic, introducing Polybeep, a magnificent polyrhythmic sound machine designed to unlock your creativity. We even prepared a built-in tutorial to get you started. With aesthetically pleasing colors and design alongside unmatched visual feedback, you can really feel the beeping beeps and the poly rhythms. Yes, you can set up polyrhythms as easy as 3-4-5. You can record sounds directly from your microphone or load sample files. There’s some magic to make them sound great. Arrange the sounds into up to 6 looping shapes that can be configured as polygons of 3~16 vertices, then tweak their effects (delay, reverb, EQ, panning, chorus, and more), make a sequence of many melodies, and you’ll have a song in no time! You can even tap to change the tempo based on a rhythmic pulse. MIDI device input is as well supported! MIDI output coming soon! (notes, sync) macOS version is also available! Polybeep has been designed with a touch screen in mind from day one but it works perfectly fine on computers. When ready, you can save your songs and export them to wav files. We’d love to hear the songs that you come up with!
Screenshots
Verdict
The clearest difference is review sentiment: Polybeep at 50% against Soi's 0%. Polybeep also leads on rating (4.7 vs 4.0) and update cadence (fortnightly vs every 2 months). Soi's advantage is price (Free vs $4.99) and iOS requirement (10.3 vs 12.0). On ratings volume, ads, in-app purchases and device support 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
Soi is free to download; Polybeep costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Polybeep holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews point the same way: 0% of Soi's written reviews are positive against 50% of Polybeep's.
Soi ships an update every 2 months, Polybeep fortnightly. The most recent releases landed on October 11, 2026 and September 30, 2026 respectively.
| Parameter | Soi | Polybeep |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.0 (2 ratings) | 4.7 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.3 — better | 12.0 |
| Further details — not scored | ||
| Size | 28 MB | 101 MB |
| Age rating | 4+ | 4+ |
| Developer | Aero Deko | Leonardo Demartino |
Customer experience
Soi
Polybeep
In-app purchases
Soi
No in-app purchases
Polybeep
No in-app purchases









