Concentration Grid vs Reaction time trainer
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Concentration Grid
This app offers a digital version of a mental focus grid exercise. Players tap numbers in sequential order within a grid, aiming for the fastest completion time. It's designed to enhance focus, concentration, and mental stamina.
- Sequential number tapping
- Timed performance tracking
- Adjustable grid sizes (3x3 to 14x14)
- Competitive challenge
- Performance improvement tracking
- Leaderboard integration
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The Concentration Grid app is based on the mental focus grid exercise. Mental focus grids have long been used as a tool by coaches and sports performance/psychology professionals to assess and improve performance of their athletes. The objective of the grid exercise is to select in sequence each of the numbers (randomly arranged and presented) in the grid. Performance is timed. The challenge is to complete the grid as quickly as possible. The exercise calls for focus and concentration. The grid exercise has been a long-time favorite of many baseball/softball coaches and players (typically using paper sheets, a pen and a stopwatch). Coaches/sports performance staff and athletes now can do their mental skills training work (and save paper) by using the Concentration Grid app on their mobile device. The Concentration Grid app is intended to provide competitive challenge and a fun/entertaining experience that is simple and straightforward ... like the printed paper grid exercise - but more convenient. Focus. Concentration. With the Concentration Grid app the level and nature of the challenge can be varied by changing the size of the grid - by selecting the number of rows and columns for the grid. Grids can be generated in a variety of sizes - from 3 columns/rows to 14 columns/rows. (A grid does not have to have the same number of rows and columns.) More rows/columns, more numbers. More numbers, more time. Try a 3x3 grid ... a 3x14 grid ... a 7x7 grid ... a 5x10 grid ... a 7x10 grid ... a 10x10 grid .... a 10x12 grid ... a 14x14 grid. You get the idea. The standard is a 10x10 grid - which a focused grid master should be able to complete in under 4 minutes. Other benchmarks ... A 3x3 grid can be completed in about 3 seconds. A 5x5 grid might be completed in under 15 seconds. A 7x7 grid can be completed by a master in well under a minute. A 9x9 grid might be completed in 3 minutes. Can you complete a 6x6 grid in under 30 seconds? Smaller grids will call for dexterity and quick vision as well as focus/concentration. Larger grids will challenge your ability to sustain focus/concentration ... your mental stamina is put to the test. Challenge yourself with the Concentration Grid app. Track and measure your improvement as you practice. Then compare your best grid times against teammates and others (against benchmark times and on the leaderboards on the community website www.concentrationgrid.net) ... who is the fastest? Who is a master of the grid? (Coaches and teachers can set up intrasquad competitions/contests to find out.) Practice makes perfect. Sustained attention and effort are rewarded with improved performance/times in the grid exercise. The grid exercise can be practiced in quiet places/at home or during road trips or during school/practices ... or under loud/distracting (game day) conditions. Parents/teachers might have their children/students use concentration grids to practice and improve concentration ability. In a world filled with distractions, use Concentration Grid to practice/exercise mental focus skills. The Concentration Grid app will provide your grid time (elapsed time to complete the grid exercise) as well as a GRID ID data set that includes additional information about your performance. The app will also maintain a history/file for you to monitor your performance/improvement. The Concentration Grid app includes a SHARE feature which will allow you to share/post your grid times and screenshots on social media and to the leaderboards (at www.concentrationgrid.net ... community site). The Concentration Grid app is perfect for coaches, athletes, students, teachers/educators, sports performance/psychology staff, parents, children, adults - young and old ... those of any age who want to challenge themselves and practice/improve their ability to focus. Make self-development a daily habit. Visit the website at www.concentrationgrid.com and the community at www.concentrationgrid.net
Reaction time trainer
Enhance your reflexes with a quick reaction test. Tap as many targets as possible within a 30-second timeframe. This training app is perfect for improving performance in games and sports, allowing you to compete with others.
- Reaction speed test
- Tap targets quickly
- 30-second challenges
- Game Center login
- Global rankings
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Maximize your performance with RapidShot. A simple game that taps as many targets as possible in 30 seconds. It is a training application which can be done anywhere for people who want to be stronger in games and sports. Let's get to the competition by getting into the vacant time! You can login to Game Center and join the ranking.
Screenshots
Verdict
The clearest difference is price: Reaction time trainer at Free against Concentration Grid's $0.99. Reaction time trainer also leads on ratings volume (294 vs 7) and rating (4.5 vs 4.3). Concentration Grid's advantage is ads (none vs shown) and update cadence (every 4 weeks vs every 2 months). On review sentiment, in-app purchases and device support 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
Reaction time trainer is free to download; Concentration Grid costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Reaction time trainer holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Reaction time trainer has 294 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 57% of Concentration Grid's written reviews are positive against 54% of Reaction time trainer's, so the app with the better star average is not the one people write more warmly about.
Concentration Grid ships an update every 4 weeks, Reaction time trainer every 2 months. The most recent releases landed on October 14, 2026 and October 20, 2026 respectively.
| Parameter | Concentration Grid | Reaction time trainer |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.3 (7 ratings) | 4.5 (294 ratings) — better |
| Positive reviews | 57.1% of reviews — better | 53.6% of reviews |
| Number of ratings | 7 | 294 — better |
| Update frequency | Every 4 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Best chart rank | #33 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 14 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | STALWART GROUP LLC | Masaharu Tsukamoto |
Customer experience
Concentration Grid
Reaction time trainer
Bugs and requests
Concentration Grid
Not enough reviews yet to summarise bugs or requests.
Reaction time trainer
Reported bugs
10 issues- Targets spawn too close
- Buttons overlap and are hard to see
- Game lags or has visual glitches
- Game requires internet connection
- Fake ad rewards
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- Distracting target outlines
- Game not working after ad
- Leaderboard issues with cheaters
- Bug with rapid retries
- Game freezes on 'Ready' screen
Requested features
6 requests- More game modes and challenges
- Leaderboard fixes for cheaters
- Option to disable ads (paid)
- Horizontal screen support
- Better timing for ad displays
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- More variety in target patterns
In-app purchases
Concentration Grid
No in-app purchases
Reaction time trainer
No in-app purchases
Questions
Is Concentration Grid free?
Is Reaction time trainer free?
Which has better reviews, Concentration Grid or Reaction time trainer?
Do Concentration Grid or Reaction time trainer have ads?
Which is updated more often, Concentration Grid or Reaction time trainer?
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