# Rivet 04 vs Rithmatic

The clearest difference is device support: Rithmatic at 4 against Rivet 04's —. Rithmatic also leads on iOS requirement (15.0 vs 17.6). On price and in-app purchases there is nothing between them.

Both are free to download. Rivet 04 sells 3 one-off in-app purchases and Rithmatic sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Rivet 04 | Rithmatic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (9 ratings)](https://appshunter.io/ios/app/rithmatic-fm-synth/id6794107110/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | — | Every 2 days |
| Monetization | — | Free |
| Size | 4 MB | 61 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | — | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Joe Topjian](https://appshunter.io/developer/1860697112) | [MADE WITH BEST PRACTICE LLC](https://appshunter.io/developer/6779338119) |

## What reviewers say

### Rivet 04

[App page](https://appshunter.io/ios/app/rivet-04-comb/id6758967505)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip - Small | $0.99 | one-time |
| Tip - Medium | $1.99 | one-time |
| Tip - Large | $3.99 | one-time |


### 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 Rivet 04 free?

Rivet 04 is free to download, with in-app purchases available.

### Is Rithmatic free?

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

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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.*