# Time Perception Test vs Inner Clock Master

The clearest difference is ads: Inner Clock Master at none against Time Perception Test's shown. Time Perception Test's advantage is update cadence (every 2 days vs every 4 days) and iOS requirement (12.0 vs 17.0). On price, 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.

Time Perception Test ships an update every 2 days, Inner Clock Master every 4 days. The most recent releases landed on September 26, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Time Perception Test | Inner Clock Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/time-perception-test/id6449470351/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 4 days |
| Monetization | Ad-supported | — |
| Size | 46 MB | 19 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Osawa Shunsuke](https://appshunter.io/developer/477431394) | [Ryoma Yanagimoto](https://appshunter.io/developer/1681944215) |

## What reviewers say

### Time Perception Test

[App page](https://appshunter.io/ios/app/time-perception-test/id6449470351)

Test your ability to accurately judge time intervals from 1 to 30 seconds. Improve your time sense and enhance productivity and decision-making skills in daily life. This app helps you develop a better understanding of time and manage your schedule more effectively.

**Highlights:** Test time intervals (1, 3, 5, 10, 30 seconds), Compare predicted vs. actual reaction time, Improve productivity and efficiency, Hone time management skills, Develop intuitive decision-making

**Features:** macOS Compatibility

**In-app purchases:** none


### Inner Clock Master

[App page](https://appshunter.io/ios/app/inner-clock-master/id6757979617)

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

**In-app purchases:** none


## Frequently asked questions

### Is Time Perception Test free?

Time Perception Test is free to download, with no in-app purchases.

### Is Inner Clock Master free?

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

### Do Time Perception Test or Inner Clock Master have ads?

Time Perception Test shows ads; Inner Clock Master does not.

### Which is updated more often, Time Perception Test or Inner Clock Master?

Time Perception Test ships an update every 2 days, and Inner Clock Master every 4 days. Most recently, Time Perception Test was updated on September 26, 2026 and Inner Clock Master on October 10, 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.*