# Audio Eyes vs Formula Kit

The clearest difference is update cadence: Formula Kit at every 11 days against Audio Eyes's every 54 months. Formula Kit also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

Audio Eyes ships an update every 54 months, Formula Kit every 11 days. The most recent releases landed on October 4, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Audio Eyes | Formula Kit |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 54 months | **Every 11 days** |
| Monetization | — | Paid |
| Size | 27 MB | 61 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Science Museum](https://appshunter.io/developer/917778255) | [玉良 刘](https://appshunter.io/developer/6777819983) |

## What reviewers say

### Audio Eyes

[App page](https://appshunter.io/ios/app/audio-eyes/id990939734)

**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 Audio Eyes free?

Audio Eyes 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 Audio Eyes or Formula Kit have ads?

Neither Audio Eyes nor Formula Kit shows ads.

### Which is updated more often, Audio Eyes or Formula Kit?

Audio Eyes ships an update every 54 months, and Formula Kit every 11 days. Most recently, Audio Eyes was updated on October 4, 2026 and Formula Kit on October 23, 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.*