Daychain
This appShips with static iOS widgets — Daily Tasks, Chain, and a Lock Screen widget — that put the in-app snapshot straight on your home screen, so you see your chain without opening anything. Widgets are read-only in v1; tap-to-complete is on the v1.1 roadmap.
Best for: iPhone users who want their chain visible without opening the app each day
Streaks
An iOS-only, one-time-paid app and an Apple Design Award winner. Its home-screen and lock-screen widgets are strong, and you can check off tasks with a single tap right from the widget.
Best for: iOS users who want to complete tasks straight from the widget
HabitKit
Shows the habit grid directly in a home-screen widget; the colorful GitHub-style tiles summarize your whole month at a glance. Runs on both iOS and Android.
Best for: People who want to see monthly progress as a visual grid in a widget
Habitify
Offers home-screen widgets on iOS and Android, plus an Apple Watch app and cross-device sync. The widgets show the day's habits and your progress.
Best for: Multi-device users who want synced widgets across iOS and Android
Productive
A subscription-based habit app with home-screen widgets on iOS and Android and an Apple Watch app. The widget shows the day's routine and completion state.
Best for: Subscription users who want a tidy view of the daily routine in a widget
The widget choice comes down to your platform: on iOS, if you want strong home-screen and lock-screen widgets and love the chain metaphor, Daychain; if completing from the widget is essential, Streaks; if you want a visual grid, HabitKit; and if you need sync across both platforms, Habitify stands out.