# Amath Clock vs KidsDee.

The clearest difference is in-app purchases: KidsDee. at none against Amath Clock's 1. Amath Clock's advantage is update cadence (every 10 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Amath Clock sells 1 in-app purchase, starting at $1.99 per year. KidsDee. asks for nothing beyond the download.

Amath Clock ships an update every 10 days, KidsDee. monthly. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Amath Clock | KidsDee. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/amath-clock/id1438428568/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | Freemium | — |
| Size | 39 MB | 196 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piyawat Rakrawee](https://appshunter.io/developer/1438428567) | [Mahidol University International College](https://appshunter.io/developer/408186489) |

## What reviewers say

### Amath Clock

[App page](https://appshunter.io/ios/app/amath-clock/id1438428568)

This app functions as a chess clock, supporting multiple players and offering customizable features like negative countdowns and round tracking. It includes a score calculator for two players and provides audio alerts. A premium subscription unlocks additional functionalities.

**Highlights:** Supports 2-4 players with custom names, Negative countdown mode, Round counter, Score calculator for 2 players, Audio alerts for button presses and time expiration, Full-screen mode, Adjustable player name size

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Pro | $1.99 | per year |


### KidsDee.

[App page](https://appshunter.io/ios/app/kidsdee/id6739701163)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Amath Clock free?

Amath Clock is free to download, with in-app purchases available.

### Is KidsDee. free?

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

### Do Amath Clock or KidsDee. have ads?

Neither Amath Clock nor KidsDee. shows ads.

### Which is updated more often, Amath Clock or KidsDee.?

Amath Clock ships an update every 10 days, and KidsDee. monthly. Most recently, Amath Clock was updated on October 3, 2026 and KidsDee. on October 1, 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.*