Periodic reminders with illustrated desk stretches and exercises to prevent repetitive strain injuries.
A workday spent at a keyboard puts the neck, shoulders, and wrists under sustained static load, and the tension accumulates quietly. This tool schedules movement against that: you set a work interval, and when it elapses the page interrupts with an illustrated desk stretch or exercise and a short break countdown, then the work cycle starts again. The surprise for most people is that the timer lives entirely in the browser tab, not on a server: reminders fire only while the page stays open, so closing the tab, sleeping the laptop, or leaving it in a throttled background tab silently delays or cancels the schedule.
A concrete input and expected output from the current implementation.
Input
Work interval 20 minutes, break 2 minutes
Expected output
The work countdown starts at 20:00 and reaches 0:00 exactly 20 minutes later, when the page swaps to an illustrated stretch card with a break countdown starting at 2:00. At 0:00 the break ends and a fresh 20:00 work countdown begins.
A countdown from 20:00 falls to 0:00 in 20 minutes, and one from 2:00 in 2 minutes, by construction; so the reminder fires the moment the work countdown hits zero, and the next cycle starts when the break countdown hits zero.
You set the work interval and the break length. The page counts down from the work interval; at zero it switches to a break screen showing an illustrated stretch with its own countdown, and when the break ends the work countdown restarts. The cycle repeats without re-arming, so one configuration can cover a whole day at the desk.
The countdown is page state, so it advances only while the page is loaded. Browsers throttle timers in background tabs (Chrome runs hidden-tab timers at most once per minute), so a reminder can arrive late when you switch tabs, and system sleep pauses the countdown outright. Exact timing means keeping the tab open and visible.
Only while the timer tab stays open. Browsers throttle timers in hidden tabs, so the alert can arrive up to a minute late, and it stops entirely when the tab closes or the machine sleeps. If the timing matters, keep the tab visible; the schedule never leaves the browser.
No account and no upload: the timer runs entirely in the browser, and your schedule is just page state. It survives a reload only if the tool stores it in the browser's local storage, so clearing site data or switching browsers resets it. Nothing you type reaches a server.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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