Open this address in Safari. Tap Share, then Add to Home Screen. Open the new icon once while online and wait for “Ready offline”.
The timer recalculates from saved timestamps whenever you return. Your Mac can be switched off.
No background alarms. Set a separate iPhone alarm for the next break if you close this app.
Keep a backup
Your records stay in this browser on this device. Clearing website data or changing devices can remove them. Export regularly. Safari and the Home Screen app may have separate storage; use export/import to move your records.
What is calculated
Matches the existing native app: overlapping 5½-, 8- and 11-hour periods, rest credit in completed 15-minute blocks, a 12-hour daily work cap and its separate 13-hour elapsed shift cap.
All gaps outside recorded rest count as work. Corrections recalculate the timeline. This is an estimate, not a National Driver Work Diary or a complete assessment of 24-hour, weekly, night-rest or stationary-rest obligations.