One Healthy Habit

One Healthy Habit is a simple, private, offline habit tracker for iOS and Android. Build and keep the daily habits that matter to you — with everything stored on your device and nothing ever sent to a server. Track what you care about Medications and supplements Water intake Sleep Mood and energy Steps Your own custom habits Gentle reminders Set reminder times for your habits. Notifications are scheduled locally on your device. Works with your health data (optional) On Android, One Healthy Habit can read your Steps, Sleep and Hydration from Health Connect and write the water you log back to Health Connect. On iOS, it can read Steps and Sleep from Apple Health and write the water you log back to Apple Health. These permissions are entirely optional — the app works fully without them, and you can revoke access at any time in your Health Connect or Apple Health settings. Private by design No account. No login. No cloud sync. No analytics. No tracking. No ads. No third-party data SDKs. Your data stays in local storage on your device and never leaves it. Start with just one healthy habit. Build a better you.