Stop the clock on exactly five.
One stop of the clock, with the digits showing. It is graded by the app’s own scoring code, so the number here is the number your phone would give you. You get three tries a day here. The app has no limit.
In the app
- Blind mode: the digits vanish once you start and an hourglass drains at a random pace
- Your best score and a score card to share
- Eight more games, with Brain Power and a day streak
App Store
Google Play · coming soon
Free. No ads, no in-app purchases, no account.
How it’s scored
From the app's own scoring code, as of September 2026.
Only one thing sets the score: how far your stop lands from 5.000 seconds. Early and late count the same. Speed and rhythm don't matter, and there's no allowance for reaction time.
| Off by | Score | Rating |
|---|---|---|
| 10 ms or less | 100 | Perfect |
| 30 ms | 98 | Outstanding |
| 60 ms | 97 | Excellent |
| 100 ms | 95 | Great |
| 200 ms | 88 | Good |
| 350 ms | 78 | Fair |
| 500 ms | 70 | Needs Practice |
| 1 second | 50 | Try Again |
| 2.5 seconds or more | 0 | Try Again |
Here the digits stay on screen. In the app, Blind mode makes them vanish once you start, and an hourglass drains at a random pace.
Questions
- Is stopping early worse than stopping late?
- No. Only the distance from 5.000 seconds counts.
- Can you get 100?
- Yes. Stop within 10 ms of 5.000 seconds. What a 100 takes
- Is there a harder version?
- In the app, Blind mode hides the digits once the clock starts.