# FlashNumbers：Train your memory vs RRLL

The clearest difference is rating: FlashNumbers：Train your memory at 5.0 against RRLL's 3.0. FlashNumbers：Train your memory also leads on review sentiment (33% vs 0%). On price, ratings volume, update cadence and ads 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 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 33% of FlashNumbers：Train your memory's written reviews are positive against 0% of RRLL's.

FlashNumbers：Train your memory ships an update every 17 months, RRLL every 10 months. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | FlashNumbers：Train your memory | RRLL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flashnumberstrain-your-memory/id1165941421/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/rrll/id1611876569/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | **33.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 17 months | **Every 10 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 52 MB | 24 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jun Koizumi](https://appshunter.io/developer/1143108654) | [YUSEI MIYOSHI](https://appshunter.io/developer/1086550692) |

## 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


### RRLL

[App page](https://appshunter.io/ios/app/rrll/id1611876569)

This game tests dynamic visual acuity by having players tap the correct half of the screen based on visual cues. Aim to beat your high score by accurately responding within a 10-second measurement period. Improve your reaction time and precision with this engaging challenge.

**Highlights:** Dynamic visual acuity measurement, 10-second testing periods, High score tracking, Left/right screen touch controls, Score-based feedback

**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 RRLL free?

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

### Which has better reviews, FlashNumbers：Train your memory or RRLL?

FlashNumbers：Train your memory is rated higher. FlashNumbers：Train your memory averages 5.0 out of 5 from 1 ratings, while RRLL averages 3.0 from 1 ratings.

### Do FlashNumbers：Train your memory or RRLL have ads?

Both FlashNumbers：Train your memory and RRLL show ads.

### Which is updated more often, FlashNumbers：Train your memory or RRLL?

FlashNumbers：Train your memory ships an update every 17 months, and RRLL every 10 months. Most recently, FlashNumbers：Train your memory was updated on September 9, 2026 and RRLL on September 20, 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.*