# StopTime vs Clock Challenge

The clearest difference is update cadence: Clock Challenge at every 2 days against StopTime's every 5 days. StopTime's advantage is iOS requirement (13.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

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

StopTime ships an update every 5 days, Clock Challenge every 2 days. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | StopTime | Clock Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clock-challenge-stop-at-10/id6800765527/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Monetization | — | Free |
| Size | 130 MB | 30 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Arman Mkhitarian](https://appshunter.io/developer/1860912570) | [Travis Moher](https://appshunter.io/developer/1869982110) |

## What reviewers say

### StopTime

[App page](https://appshunter.io/ios/app/stoptime-timer-reaction-game/id6772400704)

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

**In-app purchases:** none


### Clock Challenge

[App page](https://appshunter.io/ios/app/clock-challenge-stop-at-10/id6800765527)

Test your timing precision in this minimalist game where you get one daily attempt to stop a timer at exactly 10.000 seconds. Compete on leaderboards and build a daily streak.

**Highlights:** One daily attempt, Stop timer at 10.000 seconds, Global leaderboards, Daily streak tracking, Millisecond precision, Server-checked times

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

**In-app purchases:** none


## Frequently asked questions

### Is StopTime free?

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

### Is Clock Challenge free?

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

### Do StopTime or Clock Challenge have ads?

Neither StopTime nor Clock Challenge shows ads.

### Which is updated more often, StopTime or Clock Challenge?

StopTime ships an update every 5 days, and Clock Challenge every 2 days. Most recently, StopTime was updated on October 6, 2026 and Clock Challenge on October 15, 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.*