# Tachyon vs Scale Runner

The clearest difference is price: Scale Runner at Free against Tachyon's $1.99. Scale Runner also leads on update cadence (every 9 days vs every 14 months). Tachyon's advantage is in-app purchases (none vs 1) and chart position (#178 vs unranked). On ads and device support there is nothing between them.

Scale Runner is free to download; Tachyon costs $1.99 up front. Scale Runner sells 1 one-off in-app purchase. Tachyon asks for nothing beyond the download.

Tachyon ships an update every 14 months, Scale Runner every 9 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Tachyon | Scale Runner |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[3.8 (13 ratings)](https://appshunter.io/ios/app/tachyon/id544585980/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 77.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 9 days** |
| Monetization | Paid | — |
| Best chart rank | **#178** | — |
| Size | 12 MB | 36 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Wizdom Music LLC](https://appshunter.io/developer/377345351) | [C1GNUS STUD1O](https://appshunter.io/developer/6795326950) |

## What reviewers say

### Tachyon

[App page](https://appshunter.io/ios/app/tachyon/id544585980)

**Currently charting:** #178 Top Paid · Music (US App Store)

This app allows users to blend any two sounds together to create unique musical expressions. Its intuitive interface lets you control pitch and tone independently, offering a mesmerizing visual experience as you play.

**Highlights:** Blend any two sounds, Independent pitch and tone control, Intuitive touch interface, Mesmerizing visual feedback, Custom sound library

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ✨ Expressive instrument
- 💡 Innovative concept
- 🎨 Great visuals
- 💰 Great value for price
- 👍 Easy to use

**What reviewers complain about**

- 📉 Limited sound palette
- 🤔 Some find it basic
- 😕 Sounds can be unremarkably cheesy
- 🪞 Interface can be distracting

**Reported bugs**

- IAA and Audiobus compatibility issues
- Does not work with Audiobus
- Does not launch with Audiobus
- Inter-app audio and Audiobus connectivity missing
- Broken on iPad 2 - iOS 7

**Requested features**

- Audiobus and IAA support
- MIDI support
- MPE support
- Ability to record
- Update for notched iPhones


### Scale Runner

[App page](https://appshunter.io/ios/app/scale-runner-piano-practice/id6795850810)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scale Runner Pro | $14.99 | one-time |


## Frequently asked questions

### Is Tachyon free?

Tachyon costs $1.99, with no in-app purchases.

### Is Scale Runner free?

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

### Do Tachyon or Scale Runner have ads?

Neither Tachyon nor Scale Runner shows ads.

### Which is updated more often, Tachyon or Scale Runner?

Tachyon ships an update every 14 months, and Scale Runner every 9 days. Most recently, Tachyon was updated on October 26, 2026 and Scale Runner on October 24, 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.*