# On Track Rhythm Test vs Formula Kit

The clearest difference is update cadence: Formula Kit at every 11 days against On Track Rhythm Test's every 87 months. On Track Rhythm Test's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On Track Rhythm Test ships an update every 87 months, Formula Kit every 11 days. The most recent releases landed on October 26, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | On Track Rhythm Test | Formula Kit |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 87 months | **Every 11 days** |
| Monetization | — | Paid |
| Size | 3 MB | 61 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [University of Stavanger](https://appshunter.io/developer/591072474) | [玉良 刘](https://appshunter.io/developer/6777819983) |

## What reviewers say

### On Track Rhythm Test

[App page](https://appshunter.io/ios/app/on-track-rhythm-test/id1063712637)

**Features:** macOS Compatibility

**In-app purchases:** none


### Formula Kit

[App page](https://appshunter.io/ios/app/formula-kit/id6783818766)

Easily create, edit, and export mathematical and scientific formulas with a dedicated LaTeX editor. Features real-time rendering, a custom keyboard, and extensive template library for offline use.

**Highlights:** Real-time LaTeX rendering, Over 400 formula templates, Custom auxiliary keyboard, Image and code export, Formula library and management, Offline functionality, History and preview

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is On Track Rhythm Test free?

On Track Rhythm Test is free to download, with no in-app purchases.

### Is Formula Kit free?

Formula Kit is free to download, with no in-app purchases.

### Do On Track Rhythm Test or Formula Kit have ads?

Neither On Track Rhythm Test nor Formula Kit shows ads.

### Which is updated more often, On Track Rhythm Test or Formula Kit?

On Track Rhythm Test ships an update every 87 months, and Formula Kit every 11 days. Most recently, On Track Rhythm Test was updated on October 26, 2026 and Formula Kit on October 23, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*