66 Days: Habit Tracker
Epipherse Productivity iPhoneiPadiPod touchApple Watch
66 Days: Habit Tracker is a free Productivity app for iPhone and iPad by Epipherse. Rated 4.1/5 from 9 ratings. Requires iOS 18.0. Updated October 22, 2026.
- Rating
- 4.1
- 9 ratings
- Price
- Free
- on the App Store
- Size
- 19 MB
- Age 4+
- Updated
- Oct 22
- 2026 · v2.15.0
Screenshots
About 66 Days: Habit Tracker
According to a landmark study by University College London (UCL), it takes an average of 66 days for a new behavior to become an automatic, lifelong habit. You don't need extreme willpower or superhuman effort. By repeating small, consistent actions every day, your brain naturally transforms them into effortless routines. 66 Days is designed to help you organize your life goals into actionable projects, maintain daily streaks, and conquer the 66-day milestone to transform your lifestyle. [ 66 Days Key Features ] 1. Project-Based Habit Building • Set meaningful goals like 'Lose 10 kg' or 'Read 20 Books' and attach daily micro-actions (e.g., 30 push-ups, read 15 mins). • Completing just one habit action per day keeps your streak alive! 2. Break Bad Habits & Quit Tracker • Track your clean streaks for quitting smoking, junk food, procrastination, or screen time. • Log reflections when overcoming cravings and watch your milestone gauges grow. 3. Insightful Analytics & Milestones • Visualize your consistency with heatmap calendars, weekly trends, and overall statistics. • Reach 66 days to enshrine your achievement in the permanent 'Success Collection' and unlock badges. 4. Personalized Cards & iOS Widgets • Customize each habit card with custom photos, elegant color palettes, and blur themes. • Stay on top of your daily routines directly from your Home Screen with beautiful widgets. 5. Privacy & Biometric Lock • Keep your personal habit journal safe with Face ID and Touch ID biometric locking. 6. Lifetime Access & Premium • Unlock all premium features permanently with a single one-time purchase—no subscription stress. Start today. In 66 days, you will meet a completely new version of yourself! Terms of Use (EULA): https://66days.epipherse.com/terms/ Privacy Policy: https://66days.epipherse.com/privacy/
Ratings & reviews
4.1
9 ratings
What’s new
Version 2.15.0 · Updated October 22, 2026
• When you finish onboarding for the first time, you're now taken straight to creating your first project. Wishing you success on your 66-day journey!
App privacy
The developer, Epipherse, reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- User Content: Customer Support, Other User Content
- Identifiers: User ID
Used for: Analytics, Product Personalization, App Functionality
Alternatives to 66 Days: Habit Tracker
Looking for apps like 66 Days: Habit Tracker? Here are 6 similar apps on the App Store. The highest rated is One's Habit - Habit Tracker (5.0/5), and all 6 are free to download.
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GoodHabits: 66-Day Tracker
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One's Habit - Habit Tracker
5.0
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GGUZUNI - 30 Day challenge
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22 Days: Habit Tracker
4.7
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Habitat - Daily Habit Tracker
4.6
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ProActive Habit Tracker & ToDo
4.6
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| 66 Days: Habit Tracker | 4.1 / 5 (9 ratings) | Free | October 22, 2026 | |
| GoodHabits: 66-Day Tracker | – | Free | Aug 17, 2026 | Compare |
| One's Habit - Habit Tracker | 5.0 / 5 (7) | Free | Mar 19, 2025 | Compare |
| GGUZUNI - 30 Day challenge | 4.6 / 5 (16) | Free | Sep 11, 2026 | Compare |
| 22 Days: Habit Tracker | 4.7 / 5 (61) | Free | Jul 8, 2026 | Compare |
| Habitat - Daily Habit Tracker | 4.6 / 5 (339) | Free | Jun 16, 2026 | Compare |
| ProActive Habit Tracker & ToDo | 4.6 / 5 (73) | Free | Oct 12, 2026 | Compare |