# 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 (weekly vs every 14 months). Tachyon's advantage is in-app purchases (none vs 1) and iOS requirement (8.0 vs 15.0). 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 weekly. The most recent releases landed on October 14, 2026 and October 9, 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 | **Weekly** |
| Monetization | Paid | — |
| Size | 12 MB | 35 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)

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-theory-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 weekly. Most recently, Tachyon was updated on October 14, 2026 and Scale Runner on October 9, 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.*