How to use and verify
Tap Start without entering names or a player count. The clock stays hidden. Tap Stop when you think ten seconds have passed. Your time and distance from ten seconds appear immediately. Try again starts a fresh attempt. Pass the device to a friend to take turns. Leaving the page cancels the attempt. Display precision is 0.001 seconds, but input latency makes this unsuitable for professional timing.
Guess 10 seconds without a clock. Leaving the page cancels this attempt. Stop to see your time and error immediately.
This tool is designed for friends sharing one device. Agree on the rules and what will be shown before starting. Keep questions comfortable for everyone and let anyone skip a game. Prepare the inputs, then press Start when the group is ready. Follow the current player and progress shown on the screen. When a result appears, check it together before starting another round. This is a casual activity, not a measurement or voting system for important decisions.
Inputs and results live only in the current tab memory. There is no account, server storage or connection between players’ devices. Refreshing or closing the tab loses the session permanently. Check any result you need before leaving. Close the tab after using a shared device. Browsers may slow timers or stop camera access when the page is hidden, so keep the screen visible during play. Sound and file saving depend on your browser and device permissions. Watch the visible status even when audio is enabled. If a feature is unavailable, use the alternative input or try a supported browser. Use Tab to move between controls and Enter or Space to activate buttons. Ask friends whether the instructions are easy to understand and the game is fun in a real gathering.
FAQ
Are files or names uploaded?
No. Processing happens in browser memory without sending inputs to a server or external API. Close the tab after using a shared device.
What should I check at the end?
Guess 10 seconds without a clock. Leaving the page cancels this attempt. Stop to see your time and error immediately.
Try again?
For reference and may not be exact. Check the original and result before saving or sharing. Inputs stay on this device and are lost on refresh.