TapReaction vs One Brain
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
TapReaction
Train and test your reflexes by tapping colors or numbers as quickly as possible. Choose board size and game duration to challenge your reaction speed in various modes.
- Reaction time testing
- Color and Number modes
- Customizable board size
- Adjustable game time
- High score lists
- GameCenter support
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The human reaction time to a sudden unexpected event would be about one second - the so-called second of shock. But it is possible to reduce this time by training. Test your reaction time and train yourself with 'TabReaction'. Tap away the colors or numbers with one or with several fingers as fast you can. How much fields can you click in 30 seconds? You can choose the size of the board and as well as the playing time. The Game: Three different ways to test your reaction skills (Color-, Number- und Timemode). Game Options: - select the number of fields or strokes - Sound On/Off - Highscorelist for alle 3 play-modes - GameCenter support
One Brain
Test your cognitive abilities with a game inspired by the Stroop effect. Quickly identify matching colors, arrow directions, or true/false math equations under time pressure. Challenge your brain to process conflicting information and achieve high scores.
- Stroop effect inspired gameplay
- Color matching challenges
- Arrow direction tests
- Math equation verification
- Timed gameplay
- Score tracking
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One Brain is inspired by the Stroop effect, a famous psychological test that measures how well you handle conflicting information. For example, it's harder to name the color of a word when the word itself spells a different color. This game challenges your whole brain as you fight to process the mixed signals and make the right call before time runs out. Game modes: • Colors: Does the word match the color it's written in? • Arrows: Is the arrow actually pointing the way it says it is? • Numbers: Is the math equation true or false? • Words: Which word matches the definition? How high can you score under pressure?
Screenshots
Verdict
The clearest difference is review sentiment: One Brain at 59% against TapReaction's 0%. One Brain also leads on update cadence (weekly vs every 26 months) and rating (4.4 vs 4.0). TapReaction's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price 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. One Brain sells 1 one-off in-app purchase. TapReaction asks for nothing beyond the download.
One Brain holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: One Brain has 297 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of TapReaction's written reviews are positive against 59% of One Brain's.
TapReaction ships an update every 26 months, One Brain weekly. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.
| Parameter | TapReaction | One Brain |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 4.4 (297 ratings) — better |
| Positive reviews | 0.0% of reviews | 58.6% of reviews — better |
| Number of ratings | 1 | 297 — better |
| Update frequency | Every 26 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.4 — better | 15 |
| Further details — not scored | ||
| Size | 5 MB | 10 MB |
| Age rating | 4+ | +4 |
| Developer | Lars Bergelt | Erik Wegener |
Customer experience
TapReaction
One Brain
Bugs and requests
TapReaction
Not enough reviews yet to summarise bugs or requests.
One Brain
Reported bugs
3 issues- Incorrect registering of correct answers
- Crashes and freezes on certain devices
- Keyboard controls not working as expected
Requested features
3 requests- Adjustable difficulty levels
- More game modes and variations
- Option to disable ads or pay for ad-free version
In-app purchases
TapReaction
No in-app purchases
One Brain
- Remove Ads$0.99
