One Brain vs FlashHand
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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?
FlashHand
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FlashHand is a simple and relaxing game, straight to the point of relaxation and non-stop pressing. Come and tap the matching colored keys/baseballs for crazy clicking fun!
Screenshots
Verdict
The clearest difference is in-app purchases: FlashHand at none against One Brain's 1. FlashHand also leads on iOS requirement (12.0 vs 15). One Brain's advantage is update cadence (weekly vs every 18 months). On price, ads 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
Both are free to download. One Brain sells 1 one-off in-app purchase. FlashHand asks for nothing beyond the download.
One Brain ships an update weekly, FlashHand every 18 months. The most recent releases landed on November 11, 2026 and November 6, 2026 respectively.
| Parameter | One Brain | FlashHand |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (297 ratings) — better | — |
| Positive reviews | 58.6% of reviews | — |
| Number of ratings | 297 — better | — |
| Update frequency | Weekly — better | Every 18 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15 | 12.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 31 MB |
| Age rating | +4 | 4+ |
| Developer | Erik Wegener | sekleung chang |
Bugs and 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
FlashHand
Not enough reviews yet to summarise bugs or requests.
In-app purchases
One Brain
- Remove Ads$0.99
FlashHand
No in-app purchases
