# ab Compressor | Limiter X vs Rithmatic

The clearest difference is price: Rithmatic at Free against ab Compressor | Limiter X's $5.99. Rithmatic also leads on ratings volume (9 vs 1). ab Compressor | Limiter X's advantage is in-app purchases (none vs 4) and rating (5.0 vs 4.6). On ads and device support there is nothing between them.

Rithmatic is free to download; ab Compressor | Limiter X costs $5.99 up front. Rithmatic sells 4 one-off in-app purchases. ab Compressor | Limiter X asks for nothing beyond the download.

ab Compressor | Limiter X holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Rithmatic has 9 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | ab Compressor | Limiter X | Rithmatic |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ab-compressor-limiter-x/id6793625144/reviews)** | [4.6 (9 ratings)](https://appshunter.io/ios/app/rithmatic-fm-synth/id6794107110/reviews) |
| Number of ratings | 1 | **9** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Monetization | Paid | **Free** |
| Size | 11 MB | 61 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Alejandro Cabrera Zuniga](https://appshunter.io/developer/1660382836) | [MADE WITH BEST PRACTICE LLC](https://appshunter.io/developer/6779338119) |

## What reviewers say

### ab Compressor | Limiter X

[App page](https://appshunter.io/ios/app/ab-compressor-limiter-x/id6793625144)

This audio effect app offers advanced compression and limiting capabilities for music production. It allows independent control over three dimensional poles (Left, Right, Front) for unique sound shaping and includes features like dry/wet control for parallel processing.

**Highlights:** Per-dimensional pole compressor, Per-dimensional pole limiter, Per-dimensional pole saturator, Dry/wet control for parallel processing, Peak/RMS compression, Lookahead function, Knee control

**Features:** Vision Pro support

**In-app purchases:** none


### Rithmatic

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

This app is an FM synthesizer with a vast library of classic voices. It allows users to explore, learn, build, and blend sounds, and can be used as a standalone instrument or an AUv3 plugin within DAWs. It offers a visual representation of sound and a patch builder for understanding FM synthesis.

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

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $4.99 | one-time |
| Medium Tip | $9.99 | one-time |
| Large Tip | $19.99 | one-time |
| Extra Large Tip | $49.99 | one-time |


## Frequently asked questions

### Is ab Compressor | Limiter X free?

ab Compressor | Limiter X costs $5.99, with no in-app purchases.

### Is Rithmatic free?

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

### Which has better reviews, ab Compressor | Limiter X or Rithmatic?

ab Compressor | Limiter X is rated higher. ab Compressor | Limiter X averages 5.0 out of 5 from 1 ratings, while Rithmatic averages 4.6 from 9 ratings.

### Do ab Compressor | Limiter X or Rithmatic have ads?

Neither ab Compressor | Limiter X nor Rithmatic shows ads.

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