Test and increase the accuracy and precision of your sense of time.

For each trial, your goal is to get as close as possible to the displayed target time.

Breathe... relax, and focus on your internal sense of time.

Designed and built by Che-Wei Wang
MIT Media Lab, Playful Systems

What’s New

Version 1.02

This app has been updated by Apple to use the latest Apple signing certificate.

minor bug fixes

Ratings and Reviews

5.0 out of 5
4 Ratings

4 Ratings

Peter Joyce ,

Deceivingly addictive and fun for all ages

My nephew asks to play this on my phone as soon as he sees me.
It's a great challenge based on only your perception. Nice color palette and great looking app!

T.E.R.A ,

how is this soo entertaining?

it is quite simple and couldn't be more straightforward.. But it's quite entertaining.. the interface is nice and crisply designed.. No lag in any aspect of the game.. and it continues to consume far more of my time then just the fraction of a second I tap.

Pat on the back Che-Wei Wong and thank you

App Privacy

The developer, CW&T, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Game Center

    Challenge friends and check leaderboards and achievements.

  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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