Duo - Habit Tracker
Utilities
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
A calm habit tracker for small daily routines, gentle reminders, and private check-ins that stay on your device.
Duo is a calm habit tracker for the small routines you want to keep.
Create daily, weekly, monthly, or yearly loops. See only what is due today, check in with a quiet hold gesture, and watch your rhythm build over time.
It can also used as important date tracker.
duo is designed to feel light, private, and easy to return to. No account is required. No server sync is used. Your routines, check-ins, reminders, and notes stay on your device.
What you can do with duo:
- Create repeating routines for daily, weekly, monthly, or yearly rhythms
- See a focused Today view with only the loops that matter now
- Check in with a simple hold interaction
- Track current streaks, longest streaks, and total check-ins
- View a 365-day heatmap of your progress
- Add private notes to past check-ins
- Set local reminders at the time you choose
- Switch between light and dark appearance
duo is built for people who want consistency without pressure. It helps you keep small promises, one check-in at a time.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
- added one time reminder
The developer, Kaiqi Zhang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Kaiqi Zhang
- Size
- 30.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Kai Zhang