# Time Perception Test vs Too Fast Too Slow

The clearest difference is rating: Time Perception Test at 4.7 against Too Fast Too Slow's 4.0. Time Perception Test also leads on in-app purchases (none vs 1) and iOS requirement (12.0 vs 16.1). Too Fast Too Slow's advantage is ads (none vs shown). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. Too Fast Too Slow sells 1 one-off in-app purchase. Time Perception Test asks for nothing beyond the download.

Time Perception Test holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 3 and 4 respectively.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Time Perception Test | Too Fast Too Slow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/time-perception-test/id6449470351/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/too-fast-too-slow/id6471321976/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 46 MB | 2 MB |
| Requires iOS | **12.0** | 16.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Osawa Shunsuke](https://appshunter.io/developer/477431394) | [1418 Technologies](https://appshunter.io/developer/1700984429) |

## 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


### Too Fast Too Slow

[App page](https://appshunter.io/ios/app/too-fast-too-slow/id6471321976)

Test your reaction skills in this addictive timing challenge. Stop a timer precisely on 100 to achieve perfect scores. Unlock power-ups to aid your precision and compete with others.

**Highlights:** Precision timing challenge, Stop timer on 100, Unlockable power-ups, Score comparison, Sleek modern design, Endless gameplay

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Slo-Mo Three Pack | $0.99 | one-time |


## Frequently asked questions

### Is Time Perception Test free?

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

### Is Too Fast Too Slow free?

Too Fast Too Slow is free to download, with in-app purchases available.

### Which has better reviews, Time Perception Test or Too Fast Too Slow?

Time Perception Test is rated higher. Time Perception Test averages 4.7 out of 5 from 3 ratings, while Too Fast Too Slow averages 4.0 from 4 ratings.

### Do Time Perception Test or Too Fast Too Slow have ads?

Time Perception Test shows ads; Too Fast Too Slow does not.

### Which is updated more often, Time Perception Test or Too Fast Too Slow?

Time Perception Test ships an update every 2 days, and Too Fast Too Slow every 2 days. Most recently, Time Perception Test was updated on October 10, 2026 and Too Fast Too Slow on October 8, 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.*