With Today app you can:
- use three types of habits (simple, counter, timer)
- choose color for your habits
- set resting days which has no penalty for skipping
- set reminder notifications for every habit
- done, skip, reset, archive, delete habits
- use light/dark theme
- see your progress at a glance
- filtering habits list
- sync your habits with iCloud
And all of this for free.
Later there will be much more functionality such as watchOS, iPadOS and macOS support, more Apple health integration
And much more...