DayStamp - Habit Tracker

The idea behind DayStamp is that logging a habit shouldn't require opening an app. A Home Screen widget, a Lock Screen widget, the Apple Watch app and a Siri phrase each record a check-in with one tap, stamped onto a calendar.

The widget set covers a check-in grid, a month calendar, a weekly Lock Screen report and recent activity, plus a Shortcuts-made weekly wallpaper. Notes, photos and moods attach to entries and are searchable in a Journal. Skip marks a day that couldn't happen without breaking stats. iCloud sync and Dropbox backup are included, and one developer has kept the app going for six-plus years.

The whole point is that you rarely see the app itself. You tap a Lock Screen widget as you set the phone down, or tell Siri you've done the thing, and the stamp appears. At the end of the week the Lock Screen report shows how many stamps you earned.

When you do open it, the Journal holds whatever notes and photos you attached, and the monthly and yearly reviews surface the top habits and longest streaks. A sick day gets a Skip so the record stays honest without wrecking the numbers.

The search is for a tracker that lives on the Lock Screen and Apple Watch, where a tap is quicker than unlocking. DayStamp's widget set is unusually complete for that. The Lifetime purchase option attracts people tired of subscriptions. A 4.6 rating from 490 reviews is a decent result for a one-person project with a six-year run.

Five screenshots will likely feature widgets more than app screens: the Lock Screen panel, a stamped calendar, the Watch face and the weekly wallpaper. Stamp-on-a-calendar apps tend toward tidy grids and small coloured marks; given the emphasis on widgets, expect a visual style that matches iOS defaults rather than one that stands apart.

Version 3.3.0 marks a third major release with minor updates since, and the listing's own statement that a single developer has maintained it for more than six years is the strongest maintenance signal in this batch. 동현 hwang is credited. The 4.6 rating from 490 reviews is modest in volume but positive. It's App Store only, which is natural for a widget-centred iOS app.

Rated 4+ and free, with ads in the free version. Premium removes them and includes the full widget set, statistics, Skip and iCloud sync, offered as a monthly plan, a yearly plan or a one-time Lifetime purchase; prices aren't on the listing. iCloud sync needs an Apple ID, and Dropbox backup needs a Dropbox account. It works offline for logging. Photos attached to check-ins will use storage over time. The Watch app needs an Apple Watch. There's no Play Store version.