# Mattle Clock vs JS.Notebook

The clearest difference is rating: JS.Notebook at 5.0 against Mattle Clock's 4.0. Mattle Clock's advantage is update cadence (every 2 days vs every 50 months) and iOS requirement (8.0 vs 14.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

JS.Notebook holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Mattle Clock ships an update every 2 days, JS.Notebook every 50 months. The most recent releases landed on October 5, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Mattle Clock | JS.Notebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/mattle-clock/id1156843366/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/jsnotebook/id1470144639/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 50 months |
| Monetization | Free | Free |
| Size | 12 MB | 19 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HiuKim Yuen](https://appshunter.io/developer/952439369) | [Zijie Deng](https://appshunter.io/developer/1070117038) |

## What reviewers say

### Mattle Clock

[App page](https://appshunter.io/ios/app/mattle-clock/id1156843366)

This utility allows multiple players to use their own devices for game timers, eliminating the need to pass a single phone. It offers two modes: per-move limits for quick games and per-game time allocation for strategic play. Designed for face-to-face board games, it prioritizes flexibility over strict enforcement.

**Highlights:** Multi-device connections, Per-Move game mode, Per-Game game mode, Intuitive interface, Flexible timer control, Designed for board games

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

**In-app purchases:** none


### JS.Notebook

[App page](https://appshunter.io/ios/app/jsnotebook/id1470144639)

Build, test, and run your JavaScript code directly on your iOS device. This utility allows you to execute scripts in widgets and even use your device as a host for computer browser code execution.

**Highlights:** Build JavaScript code, Test code at runtime, Run code in widgets, Use device as code host, Code execution in computer browser

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mattle Clock free?

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

### Is JS.Notebook free?

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

### Which has better reviews, Mattle Clock or JS.Notebook?

JS.Notebook is rated higher. Mattle Clock averages 4.0 out of 5 from 1 ratings, while JS.Notebook averages 5.0 from 1 ratings.

### Do Mattle Clock or JS.Notebook have ads?

Neither Mattle Clock nor JS.Notebook shows ads.

### Which is updated more often, Mattle Clock or JS.Notebook?

Mattle Clock ships an update every 2 days, and JS.Notebook every 50 months. Most recently, Mattle Clock was updated on October 5, 2026 and JS.Notebook on September 17, 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.*