Winter Arc - 90 Days Challenge
Lock In: Daily Habit Tracker
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Your Winter Arc starts now. Sign your 90-day contract, lock in daily rules, and never reset to zero — missed days can be rescued. No account, no subscription. Just you.
The next 90 days can change everything.
Arc is the 90-day challenge tracker built for your Winter Arc. Pick a start date, write your daily rules, sign your contract — then lock in and show up every single day.
No account. No subscription. Your arc lives on your phone, not on someone's server.
【WRITE YOUR RULES, SIGN YOUR CONTRACT】
Choose your daily non-negotiables — wake up early, train, read, cold showers, no doomscrolling — from templates or write your own. Then seal them with your real signature. Changing a sealed contract takes a formal amendment, and you only get three. Your word should mean something.
【A STREAK THAT DOESN'T PUNISH YOU】
Most challenge apps delete your progress the moment you slip. Arc never resets you to zero. Missed yesterday? Rescue it within 48 hours. Life happens? Grace days give you weekly breathing room. Fell off completely? Restart from Day 1 with your history preserved. The goal is finishing 90 days — not being perfect at them.
【WATCH YOURSELF CHANGE】
A 90-square heatmap fills in day by day, next to your completion ring and streak. Milestones at Day 7, 30, 60 and 90 come with real celebrations. Add photos to your private journal and let the Journey report turn your arc into a story: where you started, where you are now.
【SHARE THE PROOF】
One tap renders a clean progress card — day count, completion rate, streak — made to be shared. Let your friends know you're locked in.
【KEEP IT IN SIGHT】
Home screen and lock screen widgets keep your day count staring back at you, and a daily reminder with a stoic quote makes sure you never quietly drift.
【WHEN THE 90 DAYS END】
Your next arc is waiting. New Year Arc, Spring Arc — the ritual repeats, your past arcs stay on the shelf, and the person who finished the last one starts the next.
Arc is free for the full 90 days. A single one-time upgrade unlocks unlimited grace and rescues, advanced stats, and theme packs — no subscription, ever.
Your future self is watching. Lock in.
【Terms of Use (EULA)】
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, Ikuhei Kure, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Ikuhei Kure
- Size
- 13.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 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+
- Contains
Advertising
- In-App Purchases
Yes
- Premium USD 11.99
- Copyright
- © kureIkuhei design