ABOUT ONTIME
Time you can see.
Focus you can start.
OnTime is a free online timer for classes and studying. Set a time and start, with no sign-in required.
In the classroom or at your desk
Teachers need quick setup and clear, large numbers. Independent learners need a rhythm of focus and breaks. OnTime brings a timer, focus routine, and stopwatch together so you can choose what fits.
Choose a preset, save settings in your browser, and share them with a link to spend less time setting up.
Your language choice is also stored only in this device's browser.
Start right away
Use it in your browser without registering or installing an app.
A clear display
The display puts the numbers and controls you need in clear view.
Your own rhythm
Adjust focus and break durations to suit you.
How the service is run
OnTime is operated by Jeon Jongwon Math Institute (전종원수학연구소). Its core timer features are currently free. No ads are served, and no visitor analytics trackers are used.
Advertising may help cover running costs in the future. Before enabling ads, we will update the privacy policy to reflect how data is handled and place ads where they do not interfere with timer controls.
For instructions, read the User guide, and for support-channel status and troubleshooting, see the Support information for details.