Contrigraph: Habit Tracker
One habit. A year at a glance.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Grow your grass. That's the whole app.
"Contrigraph" is short for contribution graph — the GitHub habit of watching squares turn green as you show up. This app takes that feeling and points it at exactly one habit.
■ One habit, on purpose
This isn't a multi-habit dashboard. Running, reading, lifting — pick one and track only that. Fewer things to manage is why it sticks.
■ A year-long strip to read your rhythm
The band across the top isn't for reading any single day — it's texture. Glance at it and you can tell when you were on a roll and when things slipped, all year at once. Tap it to jump to that month.
■ A month calendar to look back and fix things
The calendar is where the real reading (and rewriting) happens. Tap any day, past or present, and cycle its effort. Five honest levels — not counted, not measured: none, a little, okay, solid, perfect.
■ One big button for today
No hunting through a grid. Today gets its own button.
■ A nudge only when you'd actually forget
Notifications fire only on days you haven't logged yet, and you can log right from the notification. If a streak is alive, a second "before it breaks" reminder follows later in the day.
・Fully localized in English and Japanese
・Dark mode and Dynamic Type support
・Free, with a banner ad
No motivation speech required. Just tap today's square.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added a home screen widget. Record today's habit with a single tap — no need to open the app.
The developer, Hajime Nakamura, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Hajime Nakamura
- Size
- 10.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.5 or later.
- iPhone
Requires iOS 17.5 or later. - iPad
Requires iPadOS 17.5 or later. - Mac
Requires macOS 14.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.2 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Ads $1.99
- Copyright
- © 2026 Hajime Nakamura