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Sixty-Six

66 days for habits
Guillaume Loko · Health & Fitness
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App info

Developer
Guillaume Loko
Category
Health & Fitness, Productivity
Released
Sep 30, 2026
Version
1.3.2 (Oct 13, 2026)
Price
Free
Size
9.3 MB
Requires
iOS 26.5
Age rating
4+
Languages
English, French, Simplified Chinese, Spanish, Traditional Chinese

In-app purchases

none
Current prices, App Store US.

About Sixty-Six

66 is a visible countdown from 66 to 0 for the activities you want to turn into a habit: a daily workout, a breathing practice, a focus routine, anything you'd rather repeat than track. HOW IT WORKS Pick an activity, and 66 counts the days for you. Each day it's expected, you start it with one tap. Missing a day doesn't reset your progress in Standard mode 66 just keeps an honest score. Hardcore mode is stricter: a missed required activity ends that attempt and starts a fresh one, while your history stays exactly as it happened. BUILT FOR REAL ROUTINES, NOT JUST TIMERS An activity can be as simple as a duration, or built from a sequence of phases effort and rest, focus and break, inhale and hold repeated as many times as you like. 66 speaks each phase as it begins, so you can keep your eyes closed or your phone in your pocket. RUN MORE THAN ONE AT A TIME Track several 66-day challenges…
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