Brain Training vs O
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Brain Training
This game offers fast-paced training to enhance reaction time, reflexes, and brain speed. It features simple, intuitive gameplay where players tap targets as quickly and accurately as possible to improve their performance.
- Improve reaction speed and reflexes
- Sharpen brain processing speed
- Simple and intuitive gameplay
- Speed test style challenges
- 20 progressive stages
- Track performance and beat scores
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Free. No registration. Just tap and train your reaction speed. Brain Training: Quick Reaction is a fast-paced reaction training game that helps improve reaction time, reflexes, and brain speed through simple and fun gameplay. Tap the targets as quickly and accurately as possible. Easy to play, but challenging to master. WHY YOU'LL LOVE THIS GAME: • Fast and fun reaction training • Simple and intuitive gameplay • Speed test style challenges • Clear sense of improvement TRAIN YOUR REACTION TIME: • Improve reaction speed and reflexes • Sharpen brain processing speed • Perfect for short training sessions HOW TO PLAY: • Tap randomly appearing targets • Tap only the number shown on the target • Wrong taps or zero reduce your score TRACK YOUR PERFORMANCE: • Test your reaction speed • Beat your best score • Improve aim and accuracy PROGRESSIVE STAGES: • 20 stages from beginner to advanced • Increasing difficulty • Sci-fi inspired world RECOMMENDED FOR: • Reaction and reflex game fans • Players who want to improve reaction time • Athletes training quick responses • FPS and action game players • Anyone looking for a simple brain training game Train the flow of vision to brain to action. React faster with every play. Unlock your full reaction potential.
O
Navigate a spinning circle through challenging obstacles in this minimal action runner. Levels dynamically change direction and flip, testing your reflexes. Compete globally and unlock customizations.
- One-tap gameplay
- Mind-bending geometry
- Randomly generated levels
- Chiptune soundtrack
- Unlockable customizations
- Global leaderboards
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Jump into the spinning circle of O-VOID! In this super minimal action runner, you’ll be jumping over obstacles with the tap of a finger. But this is not a regular platformer! The entire level can change direction or flip upside down to throw you off. Are you skilled enough to survive every challenge? Features: • Simple one-tap gameplay inside mind-bending geometry • 7 randomly generated levels for endless replayability • Unique and pumping chiptune soundtrack • Near impossible challenges to unlock player customizations • Global leaderboards to compete with the world on
Screenshots
Verdict
The clearest difference is in-app purchases: Brain Training at none against O's 1. O's advantage is update cadence (weekly vs every 2 months) and review sentiment (72% vs 52%). On price, rating, ratings volume 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
Both are free to download. O sells 1 one-off in-app purchase. Brain Training asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.6 for Brain Training against 4.6 for O. Both are backed by a comparable volume of ratings — 92 and 191 respectively. Written reviews are what separate them: 52% of Brain Training's written reviews are positive against 72% of O's.
Brain Training ships an update every 2 months, O weekly. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.
| Parameter | Brain Training | O |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (92 ratings) | 4.6 (191 ratings) |
| Positive reviews | 51.5% of reviews | 72.4% of reviews — better |
| Number of ratings | 92 | 191 — better |
| Update frequency | Every 2 months | Weekly — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Best chart rank | — | #157 — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 146 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | THOMSON Inc. | Gearhead Games ApS |
Customer experience
Brain Training
O
Bugs and requests
Brain Training
Not enough reviews yet to summarise bugs or requests.
O
Reported bugs
9 issues- Spinning makes users sick
- Obstacles in later levels require luck/insane reaction time
- Effect does not disappear properly in penultimate level
- Game is glitchy, laggy, and unresponsive
- Revive ad doesn't work/can't close ad
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- Ads during gameplay cause freezes
- Level 6 is impossible
- Ads are annoying and unsolicited
- Forced ads when choosing to restart
Requested features
6 requests- Add more levels
- New dimension/different gameplay principle
- User level creator
- More beats/music synchronization
- Option to turn down color brightness
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- More publicity for leaderboards
In-app purchases
Brain Training
No in-app purchases
O
- No Ads$2.99









