Tap a button when you do the thing. Later, one look tells you if you already did it, and when.
Try it: tap “Locked the door” now. Every button shows when you last tapped it.
Change my list
Rename, reorder, pick an icon and colour, or say how often you expect to do each thing. Changes save straight away.
Backup
Everything lives only in this browser. Save a copy now and then, or move it to another device.