# Moustra vs Snake Rules

The clearest difference is price: Moustra at Free against Snake Rules's $4.99. Moustra also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (14.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Moustra is free to download; Snake Rules costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Moustra ships an update weekly, Snake Rules every 3 weeks. The most recent releases landed on September 5, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Moustra | Snake Rules |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | — | Paid |
| Size | 44 MB | 2 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Moustra](https://appshunter.io/developer/1845728241) | [Andre Luiz Rodrigues Costa](https://appshunter.io/developer/1858598247) |

## What reviewers say

### Moustra

[App page](https://appshunter.io/ios/app/moustra/id6753925485)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Snake Rules

[App page](https://appshunter.io/ios/app/snake-rules/id6756125263)

Measure the length of reptiles and other animals from a single photo using a reference object. Track growth, organize records, and export data securely on-device.

**Highlights:** Accurate measurements from photos, Simple point-marking system, Zoom and pan for precision, Save and organize animal data, Growth tracking with charts, Export data to PDF and CSV, Works offline

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Moustra free?

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

### Is Snake Rules free?

Snake Rules costs $4.99, with no in-app purchases.

### Do Moustra or Snake Rules have ads?

Neither Moustra nor Snake Rules shows ads.

### Which is updated more often, Moustra or Snake Rules?

Moustra ships an update weekly, and Snake Rules every 3 weeks. Most recently, Moustra was updated on September 5, 2026 and Snake Rules on September 28, 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.*