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Get Once

Habit tracker for iPhone

The habit tracker that forgives a missed day

Once keeps your daily habits to one tap each, and keeps your streaks honest. Miss a day, repair it, and carry on. Free for 3 habits.

Download on the App Store
Once Today screen: a 51-day current streak, 2 of 6 habits done, and habit rows for Drink water, Meditate and Journal

Repair days

Missed a day? Repair it

A missed day doesn’t have to wipe out a long streak. Spend a repair day and the streak carries on. You choose how many you get each month: 2, 3 or 5.

Once Today screen with the message “Streak repaired — back to 32 days. 2 repairs left.”

Habit detail

Each habit, up close

Current and best streak, the last 30 days, a reminder time and the days it repeats on. Forgot to log yesterday? Fill in the day and it counts the same.

Once habit detail for “Read 20 pages”: 51-day streak, a 30-day grid, Fill in a day, reminder and repeat settings

Month

Your month at a glance Once Unlimited

A completion calendar for the month, your average score, perfect days, and how each habit did.

Once Monthly overview: 91% average score, a completion calendar for September and per-habit completion rates

Achievements

Milestones worth hitting

24 achievements for streak length, total check-offs and perfect days, from a 3-day streak to a full year.

Once Achievements: 17 of 24 unlocked, grouped into streaks, volume and consistency

Year heatmap

Your year as a heatmap Once Unlimited

The last 36 weeks as a GitHub-style grid: one dot per day, darker the bigger share of your habits you completed. Gaps show up immediately, and so does a good run.

36 weeks agoLess MoreToday
Once Yearly overview: 649 habits completed in 2026, a best streak of 51 days and an activity heatmap

Free, or Once Unlimited

Free

Free, for as long as you like.

  • ✓ Up to 3 habits
  • ✓ Streaks and repair days
  • ✓ Reminders at any time
  • ✓ Weekly overview
  • ✓ Achievements
  • ✓ Backup export and restore

Once Unlimited

A one-time purchase. No subscription.

  • ✓ Unlimited habits
  • ✓ Month view
  • ✓ Year heatmap
  • ✓ Custom streak goal
  • ✓ More icons and colours

Questions

Is Once free?

Yes. Once is free for up to 3 habits, with streaks, repair days, reminders, the weekly overview and achievements included. Once Unlimited is a one-time purchase that adds unlimited habits, the Month and Year views, a custom streak goal and more icons and colours. There is no subscription.

Do I need an account?

No. There is no sign-up. Your habits are stored on your iPhone, and you can export a backup file and restore it on a new phone.

What happens to my streak if I miss a day?

It shows as paused instead of dropping straight to zero. Spend one of your monthly repair days and it carries on. If you did the habit and only forgot to log it, fill in that day instead.

Can my family use Once Unlimited?

Yes. Once Unlimited supports Family Sharing, so one purchase covers your family group.

Is Once available on Android?

No. Once is an iPhone app.

Missed a day already? Read how to get back on track with the never-miss-twice rule.

Start with one habit today

Free for 3 habits. No account needed.

Download on the App Store