# FlashNumbers：Train your memory vs Time Perception Test

The clearest difference is update cadence: Time Perception Test at every 2 days against FlashNumbers：Train your memory's every 17 months. Time Perception Test also leads on ratings volume (3 vs 1). FlashNumbers：Train your memory's advantage is rating (5.0 vs 4.7). On price, ads, in-app purchases and monetization model there is nothing between them.

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

FlashNumbers：Train your memory holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

FlashNumbers：Train your memory ships an update every 17 months, Time Perception Test every 2 days. The most recent releases landed on September 9, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | FlashNumbers：Train your memory | Time Perception Test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flashnumberstrain-your-memory/id1165941421/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/time-perception-test/id6449470351/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 17 months | **Every 2 days** |
| Monetization | Ad-supported | Ad-supported |
| Size | 52 MB | 46 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jun Koizumi](https://appshunter.io/developer/1143108654) | [Osawa Shunsuke](https://appshunter.io/developer/477431394) |

## What reviewers say

### FlashNumbers：Train your memory

[App page](https://appshunter.io/ios/app/flashnumberstrain-your-memory/id1165941421)

This game challenges your visual acuity and memory by having you memorize and input numbers shown briefly on screen. Progress through increasing difficulty levels and track your daily improvements with graphs. Share your high scores on social media.

**Highlights:** Memorize and input numbers, Dynamic visual acuity training, Multiple difficulty levels, Daily improvement graphs, Tutorial for beginners, Share results to SNS

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is FlashNumbers：Train your memory free?

FlashNumbers：Train your memory is free to download, with no in-app purchases.

### Is Time Perception Test free?

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

### Which has better reviews, FlashNumbers：Train your memory or Time Perception Test?

FlashNumbers：Train your memory is rated higher. FlashNumbers：Train your memory averages 5.0 out of 5 from 1 ratings, while Time Perception Test averages 4.7 from 3 ratings.

### Do FlashNumbers：Train your memory or Time Perception Test have ads?

Both FlashNumbers：Train your memory and Time Perception Test show ads.

### Which is updated more often, FlashNumbers：Train your memory or Time Perception Test?

FlashNumbers：Train your memory ships an update every 17 months, and Time Perception Test every 2 days. Most recently, FlashNumbers：Train your memory was updated on September 9, 2026 and Time Perception Test on June 11, 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.*