# spool. vs Rithmatic

The clearest difference is review sentiment: spool. at 100% against Rithmatic's 67%. spool. also leads on rating (5.0 vs 4.6). Rithmatic's advantage is monetization model (free vs free with in-app purchases) and device support (4 vs 2). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. spool. sells 1 one-off in-app purchase and Rithmatic sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

spool. holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 7 and 9 respectively. Written reviews point the same way: 100% of spool.'s written reviews are positive against 67% of Rithmatic's.

## The numbers

| Metric | spool. | Rithmatic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/spool-tape-synth/id6785721308/reviews)** | [4.6 (9 ratings)](https://appshunter.io/ios/app/rithmatic-fm-synth/id6794107110/reviews) |
| Number of ratings | 7 | **9** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 2 MB | 61 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Kristopher Yang](https://appshunter.io/developer/6785721310) | [MADE WITH BEST PRACTICE LLC](https://appshunter.io/developer/6779338119) |

## What reviewers say

### spool.

[App page](https://appshunter.io/ios/app/spool-tape-synth/id6785721308)

Create full songs on your phone with this pocket music studio. It offers a variety of sound engines, sampling capabilities, step sequencing, and a 4-track tape recorder for recording and mixing your music. Effects and MIDI controller support enhance the creative process.

**Highlights:** Multiple sound engines, Sampling and sequencing, 4-track tape recording, Extensive effects rack, MIDI controller support, Step sequencer

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spool Pro | $9.99 | 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 spool. free?

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

### Is Rithmatic free?

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

### Which has better reviews, spool. or Rithmatic?

spool. is rated higher. spool. averages 5.0 out of 5 from 7 ratings, while Rithmatic averages 4.6 from 9 ratings.

### Do spool. or Rithmatic have ads?

Neither spool. 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.*