Comparison

FlashNumbers:Train your memory vs RRLL

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

FlashNumbers:Train your memory

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
Read full description

【overview】 It is an application that challenges the limits of dynamic visual acuity and memory. By playing repeatedly, you can also train your dynamic visual acuity and memory. It is a game to memorize and input the numbers displayed on the screen only for a moment. As you continue to answer correctly, the time displayed will decrease little by little. The game continues until you make a mistake. Test your limits or use it to train your dynamic vision and memory. We have prepared several difficulty levels, so please play with the difficulty level that suits you. We recommend that you start with the easy ones first. You can post the results to various SNS by pressing the Share button on the result screen. Please share if you get good results. The app permissions require access to storage, but I'm using it to take screenshots for posting. You can see the number of correct answers every day in a graph, so you can see how much you have improved. 【function】 There are 5 levels: Beginner, Elementary, Intermediate, Advanced and Advanced. Three numbers are displayed in the introductory. After that, it will increase by 1, and it will be 7 in special class. ・Tutorial function. We have tutorials for beginners. You can learn how to play while actually experiencing. ・You can see the record of each game. ・Changes in the number of clears for each difficulty level for 31 days are displayed in a graph. 【Operation instructions】 Enter a number using the numeric buttons on the lower left. If you want to erase one character, press Back. After entering, click OK to proceed. 【price】 You can play all for free.

About

RRLL

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
Read full description

RRLL is a game that measures dynamic visual acuity. When you start the game, the measurement for 10 seconds will start. Let's measure with the aim of updating the high score. R: Touch the right half of the screen. L: Touch the left half of the screen. Good = score + 100 / Miss = score - 100

Screenshots

FlashNumbers:Train your memory4 screens
RRLL1 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
FlashNumbers:Train your memory versus RRLL: the parameters behind the verdict, then further details
ParameterFlashNumbers:Train your memoryRRLL
PriceFreeFree
Rating5.0 (1 ratings) — better3.0 (1 ratings)
Positive reviews33.3% of reviews — better0.0% of reviews
Number of ratings11
Update frequencyEvery 17 monthsEvery 10 months — better
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supportedAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size52 MB24 MB
Age rating4+4+
DeveloperJun KoizumiYUSEI MIYOSHI

Customer experience

FlashNumbers:Train your memory

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

RRLL

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

FlashNumbers:Train your memory

No in-app purchases

None

RRLL

No in-app purchases

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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