# ThumbJam vs Scale Numbers Piano

The clearest difference is price: Scale Numbers Piano at Free against ThumbJam's $6.99. Scale Numbers Piano also leads on update cadence (fortnightly vs every 4 months). ThumbJam's advantage is rating (4.7 vs 4.2) and in-app purchases (none vs 1). On ads and device support there is nothing between them.

Scale Numbers Piano is free to download; ThumbJam costs $6.99 up front. Scale Numbers Piano sells 1 one-off in-app purchase. ThumbJam asks for nothing beyond the download.

ThumbJam holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: ThumbJam has 220 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 85% of ThumbJam's written reviews are positive against 65% of Scale Numbers Piano's.

ThumbJam ships an update every 4 months, Scale Numbers Piano fortnightly. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ThumbJam | Scale Numbers Piano |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[4.7 (220 ratings)](https://appshunter.io/ios/app/thumbjam/id338977566/reviews)** | [4.2 (12 ratings)](https://appshunter.io/ios/app/scale-numbers-piano/id1270369797/reviews) |
| Number of ratings | **220** | 12 |
| Positive reviews | **84.6% of reviews** | 65.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 215 MB | 340 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sonosaurus LLC](https://appshunter.io/developer/338977569) | [Scale Degrees LTD](https://appshunter.io/developer/1255001566) |

## What reviewers say

### ThumbJam

[App page](https://appshunter.io/ios/app/thumbjam/id338977566)

This app provides a powerful musical performance experience with over 40 high-quality instrument sounds and hundreds of scales. It allows users of all skill levels to play in any style, offering expressive controls and loop-building capabilities.

**Highlights:** Over 40 high-quality multi-sampled instruments, Hundreds of included scales for any style, Expressive controls using tilt and shake, Loop building and audio export, Extensive MIDI and Audiobus support, Powerful arpeggiator feature

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🎨 Great sound quality
- 🎹 Versatile and expressive instrument
- 🎶 Excellent for music creation and improvisation
- 💻 Powerful MIDI capabilities
- 🎨 Realistic instrument samples

**What reviewers complain about**

- 🔍 Lack of chord mode
- 🔢 Difficulty with precise note selection
- 🔀 Issues with loop recording and syncing
- 🔋 Battery drain concerns
- 🚫 Compatibility problems with newer devices/OS

**Reported bugs**

- Instrument muting when switching apps or opening help
- Inconsistent behavior and freezing after recent updates
- Inability to load/save recorded sets or mixes

**Requested features**

- Add chord mode for easier chord playing
- Improve loop recording and syncing capabilities
- Implement quantization options for tighter timing
- Expand instrument library with more diverse sounds
- Add support for Audio Unit (AUv3) to integrate with DAWs


### Scale Numbers Piano

[App page](https://appshunter.io/ios/app/scale-numbers-piano/id1270369797)

Compose melodies and chords simultaneously on your device. Record and loop your creations for improvisation and songwriting. Learn music theory and play popular songs with a unique scale number system, no prior knowledge needed.

**Highlights:** Play melody and chords together, Record and live loop compositions, Theory lessons and songbook, Scale number system for easy learning, Built-in sampler instruments, MIDI input for DAWs

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


## Frequently asked questions

### Is ThumbJam free?

ThumbJam costs $6.99, with no in-app purchases.

### Is Scale Numbers Piano free?

Scale Numbers Piano is free to download, with in-app purchases available.

### Which has better reviews, ThumbJam or Scale Numbers Piano?

ThumbJam is rated higher. ThumbJam averages 4.7 out of 5 from 220 ratings, while Scale Numbers Piano averages 4.2 from 12 ratings.

### Do ThumbJam or Scale Numbers Piano have ads?

Neither ThumbJam nor Scale Numbers Piano shows ads.

### Which is updated more often, ThumbJam or Scale Numbers Piano?

ThumbJam ships an update every 4 months, and Scale Numbers Piano fortnightly. Most recently, ThumbJam was updated on November 6, 2026 and Scale Numbers Piano on November 3, 2026.

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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.*