# Rithmatic vs KAGARIBI

Rithmatic and KAGARIBI both sit at 4.6 stars, but that hides the real split: 67% of Rithmatic's written reviews are positive against 0% of KAGARIBI's. Rithmatic also leads on device support (4 vs 2) and iOS requirement (15.0 vs 17.0). KAGARIBI's advantage is in-app purchases (none vs 4). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Rithmatic sells 4 one-off in-app purchases. KAGARIBI asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Rithmatic against 4.5 for KAGARIBI. Both are backed by a comparable volume of ratings — 9 and 4 respectively. Written reviews are what separate them: 67% of Rithmatic's written reviews are positive against 0% of KAGARIBI's.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Rithmatic | KAGARIBI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (9 ratings)](https://appshunter.io/ios/app/rithmatic-fm-synth/id6794107110/reviews)** | [4.5 (4 ratings)](https://appshunter.io/ios/app/kagaribi-auv3-synth/id6802303349/reviews) |
| Number of ratings | **9** | 4 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | Free | Free |
| Size | 61 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MADE WITH BEST PRACTICE LLC](https://appshunter.io/developer/6779338119) | [Code and DESIGN inc.](https://appshunter.io/developer/1172903960) |

## What reviewers say

### Rithmatic

[App page](https://appshunter.io/ios/app/rithmatic-fm-synth/id6794107110)

This app is an FM synthesizer featuring a vast library of classic voices. It allows users to explore, learn, build, and blend sounds using an intuitive interface and an AUv3 plugin for DAWs. It offers a comprehensive synthesis engine and various playback options.

**Highlights:** 36,118 classic DX7 voices included, AUv3 plugin for DAWs, Patch Builder to learn FM synthesis, Sound blending feature, On-screen and MIDI keyboard support, Arpeggiator and latch function, WAV export

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Comrade! | $4.99 | one-time |
| Major Supporter | $9.99 | one-time |
| Supporting Member | $19.99 | one-time |
| Underwriter | $49.99 | one-time |


### KAGARIBI

[App page](https://appshunter.io/ios/app/kagaribi-auv3-synth/id6802303349)

This music creation tool allows users to shape and understand sound with a powerful synthesizer and an integrated sound anatomy feature. It offers extensive sound design capabilities, MIDI support, and advanced tuning options for both standalone use and as an AUv3 instrument.

**Highlights:** Dual oscillators with analog waveforms and wavetables, Extensive modulation matrix and effects suite, Integrated Sound Anatomy for sound explanation, Support for MPE and MIDI 2.0, Advanced tuning systems beyond 12-TET, Offline WAV export, Live Safe mode for reduced audio dropouts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rithmatic free?

Rithmatic is free to download, with in-app purchases available.

### Is KAGARIBI free?

KAGARIBI is free to download, with no in-app purchases.

### Which has better reviews, Rithmatic or KAGARIBI?

Rithmatic is rated higher. Rithmatic averages 4.6 out of 5 from 9 ratings, while KAGARIBI averages 4.5 from 4 ratings.

### Do Rithmatic or KAGARIBI have ads?

Neither Rithmatic nor KAGARIBI shows ads.

### Which is updated more often, Rithmatic or KAGARIBI?

Rithmatic ships an update every 2 days, and KAGARIBI every 2 days. Most recently, Rithmatic was updated on October 24, 2026 and KAGARIBI on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*