# Crab Fit App vs MathWrite Notes

The clearest difference is in-app purchases: Crab Fit App at none against MathWrite Notes's 2. Crab Fit App also leads on update cadence (every 3 days vs monthly). MathWrite Notes's advantage is iOS requirement (18.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. MathWrite Notes sells 2 in-app purchases, starting at $9.99 per month. Crab Fit App asks for nothing beyond the download.

Crab Fit App ships an update every 3 days, MathWrite Notes monthly. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Crab Fit App | MathWrite Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Size | 4 MB | 45 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Benedict Woo](https://appshunter.io/developer/1810981361) | [Andres Osorio Leyenda](https://appshunter.io/developer/6807434389) |

## What reviewers say

### Crab Fit App

[App page](https://appshunter.io/ios/app/crab-fit-app/id6789153902)

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

**In-app purchases:** none


### MathWrite Notes

[App page](https://appshunter.io/ios/app/mathwrite-notes/id6807434387)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathWriteNotes Monthly Subscription | $9.99 | per month |
| MathWriteNotes Yearly Subscription | $39.99 | per year |


## Frequently asked questions

### Is Crab Fit App free?

Crab Fit App is free to download, with no in-app purchases.

### Is MathWrite Notes free?

MathWrite Notes is free to download, with in-app purchases available.

### Do Crab Fit App or MathWrite Notes have ads?

Neither Crab Fit App nor MathWrite Notes shows ads.

### Which is updated more often, Crab Fit App or MathWrite Notes?

Crab Fit App ships an update every 3 days, and MathWrite Notes monthly. Most recently, Crab Fit App was updated on October 16, 2026 and MathWrite Notes on October 11, 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.*