66-Day Streak: Habit Builder
A focused habit tracker built around the 66-day habit model
- Freemium · from $1.99/mo
- iOS
- Launched October 18, 2026
- 2comments
- 14upvotes
- 1,321views
Find what actually affects your sleep quality.
A focused habit tracker built around the 66-day habit model
Find what actually affects your sleep quality.
Build better habits. Stay consistent. Make them stick.
66 Streaks is a privacy-first habit tracker for iPhone and Apple Watch, designed to help you turn daily actions into lasting routines.
Whether you want to exercise more, read every day, learn something new or build healthier routines, 66 Streaks helps you stay focused on what matters: showing up consistently.
Why 66 days?
Research from University College London found that forming a habit takes a median of 66 days, although everyone's journey is different. That's why 66 Streaks uses a visual 66-day framework to make your progress tangible, motivating and easy to follow.
Everything you need to build better habits:
• 66-Day Progress Grid: Watch your consistency grow, one day at a time.
• Quick Daily Check-ins: Mark habits complete with a single tap.
• Measurable Goals: Track steps, reading pages, repetitions and more.
• Smart Reminders: Stay consistent with helpful notifications.
• Widgets & Live Activities: Keep your progress visible throughout the day.
• Apple Watch & Siri: Track habits and check in conveniently.
• Milestones & Achievements: Celebrate meaningful accomplishments.
• Insights & Weekly Recaps: Understand your habits and progress.
• Flexible Streaks: Pause habits when needed and protect your progress with Flame Guards.
Start free. Grow at your own pace.
Track up to 4 habits for free, with reminders, widgets, daily goals and essential tracking features. Upgrade to Premium for unlimited habits, Apple Health automation, advanced insights, backups and more.
Your habits. Your data. Your privacy.
No account required. No ads. No tracking. Works offline. Your habit data stays on your device.
Building better habits isn't about being perfect. It's about making progress, one day at a time.
Start your 66-day journey today.
https://66streaks.com/
