FlashNumbers：Train your memory vs Concentration Game
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- Memorize and input numbers
- Dynamic visual acuity training
- Multiple difficulty levels
- Daily improvement graphs
- Tutorial for beginners
- Share results to SNS
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【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.
Concentration Game
A classic single-player card game where you match pairs of numbers. The challenge increases with a decreasing time limit as you advance through levels. Enjoy a brain-training experience with this solo card game.
- Single-player card game
- Match numbered pairs
- Time limit decreases with level
- Brain training
- Classic card game mechanics
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It is a classic card game. For one person. Match pairs of the same numbers. The time limit decreases as the level goes up. You can obtain and collect images by clearing levels.
Screenshots
Verdict
The clearest difference is review sentiment: Concentration Game at 100% against FlashNumbers：Train your memory's 33%. Concentration Game also leads on update cadence (every 5 months vs every 17 months) and ratings volume (21 vs 1). FlashNumbers：Train your memory's advantage is rating (5.0 vs 4.6) and iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model 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
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 4.6. That said, the two scores are not equally well evidenced: Concentration Game has 21 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 33% of FlashNumbers：Train your memory's written reviews are positive against 100% of Concentration Game's, so the app with the better star average is not the one people write more warmly about.
FlashNumbers：Train your memory ships an update every 17 months, Concentration Game every 5 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | FlashNumbers：Train your memory | Concentration Game |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.6 (21 ratings) |
| Positive reviews | 33.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 21 — better |
| Update frequency | Every 17 months | Every 5 months — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 52 MB | 103 MB |
| Age rating | 4+ | 4+ |
| Developer | Jun Koizumi | Hirokazu Uno |
Customer experience
FlashNumbers：Train your memory
Concentration Game
In-app purchases
FlashNumbers：Train your memory
No in-app purchases
Concentration Game
No in-app purchases
Questions
Is FlashNumbers：Train your memory free?
Is Concentration Game free?
Which has better reviews, FlashNumbers：Train your memory or Concentration Game?
Do FlashNumbers：Train your memory or Concentration Game have ads?
Which is updated more often, FlashNumbers：Train your memory or Concentration Game?
Other comparisons
