0 always shows the timer. 1 briefly shows the current time from 28.9 seconds to 31.1 seconds past each minute. 2 also shows it from 13.9 seconds to 16.1 seconds and from 43.9 seconds to 46.1 seconds.
OFF disables breathing guidance. 3s, 4s, and 5s set how long each side of the breathing box takes: inhale, hold, exhale, hold.
Keep Awake may keep your phone unlocked longer. In public, consider using Guided Access (iPhone) or Screen Pinning (Android).
Some browsers and devices do not support Keep Awake, and power-saving modes may disable it. Settings are remembered on this device.
Designed this as a simple count up / down timer that runs on almost anything with a browser - enjoy.
When first loaded, or after you press Reset, the display shows the current time. Press Start for a normal count-up timer, or press the up arrow to set minutes for a countdown timer. When the countdown reaches zero, it keeps going and shows the total elapsed time.
On some iPhones and Android phones, you may be able to install this as a web app using your browser's Add to Home Screen option. That can give you a cleaner, more fullscreen view with less browser UI visible.
Disclaimer: This timer is provided "as is" with no guarantees. Results may vary by device / browser, and backgrounding the page may pause timing.