The ultimate competitive speedcubing / Rubik's cube timer allows you to practice like an official competition!

CompSim is your ultimate competitive speedcubing timer. In an official cubing competition, you don't do individual solves⁠⁠—you solve in an average of 5, mean of 3, or best of 3 format. CompSim streamlines this mode of practice by giving you the capability to practice like this and visualize your progress from this perspective.

Not only that, but CompSim allows for you to set a target, or a time to beat. This allows you to work toward a certain goal, like your official personal best (PB) or your long-term barrier. 

When you win (or lose), you get to the experience acted out by a cuber of your choice!

CompSim has plenty of customizable, intuitive features to make the user experience better than any other cubing timer, period. From WCA inspection and timer update to custom holding time and a beautiful dark mode, you can make your CompSim experience unique to you.

Of course, CompSim comes with the standard capabilities of any cubing timer⁠⁠—scrambles of all types, on-screen timing to the nearest 0.01, stackmat timer entry, and penalties are all included through a beautiful interface.

What’s New

Version 2.1.0

- Fixed scramble display for Megaminx, Square-1, and Skewb!

Ratings and Reviews

4.8 out of 5
218 Ratings

218 Ratings

NameMinusActor ,

The timer is slow

Edit: timer is fixed! Was pretty fast fix too
I was really excited to use this and the app was working perfectly, but about 15-20 solves in- the timer started going really slow. I got three sub-10s in a row when my PB is 9.8 when I ran it alongside another stopwatch the timer was 6 seconds behind when it reached 10seconds. The actual stopwatch was at 16 seconds when this timer reached 10 seconds. I tried force closing the app but it didn’t work. I hope you fix this soon

Developer Response ,

Hey NameMinusActor, we've fixed this slow timer issue in the current version! Check it out!

chasecuber ,

Most of the reviews are fake, but here is my opinion

The bad scrambles review for the square-1 WORKS I can’t believe there are so many rumors about this app, anyways onto the actual review. The timer is a bit slow, inspection voice I wish it was better sounding and the scrambles on the Megaminx make no sense maybe they might but I originally used Chao Timer for Megaminx scrambles. But since it takes cubing to another step, I’m giving it an extra star. It’s a really good game and if you keep on doing daily updates like these, then I think this is a new best timer for cubing.
Overall, this app gets a big solid 4.5, but since you can’t do that, I will give it a 4 because of multiple glitches. It is a good cubing timer app though, I think the cubing community should have some more timers like these, and add some more exciting things added in like sharing a PB to a friend.
I recommend this timer, if you are a beginner, or if you are sub 10.

Just a saying though, I like Chao Timer a little bit better. It has less bugs but the only thing it doesn’t have on iPad is inspection time. So I’m looking forward to this cubing timer as well.

哇哈哈公司 ,

Fantastic work, but one bug I want to point out

There was one bug I had encounter with the timer. Whenever I stop the timer on an exact number like a 7.00, 8.00, or a 9.00 the first number always displays as one minuses by the number. For example if I stopped the timer at 8.00 it displays 7.00. Although it registers as a 8.00 but it might be nice to solve this little display bug.

App Privacy

The developer, Rami Sbahi, 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.


  • Family Sharing

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

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