Plan and do the one thing
that matters most today.

It’s better to plan and complete one thing than to charge into a long to-do list and miss what mattered. One Thing helps you pick the single most important task each day — and actually do it.

Get the app How it works

One thing. Done.

Each evening you decide tomorrow’s One Thing. Each morning you’re reminded what it was. Each night you check it off. Small daily wins compound — and most days, picking the right task matters more than picking lots of tasks.

If people really think of the one thing that would make their day feel successful and make sure they do it, they experience a snowball of back-to-back successes.

What you get

A small, focused tool that gets out of your way. No ads, no analytics, no streak-shaming.

One thing per day

Set a single task for today — or any day in the future. Mark it done with one tap. Late completions are tracked separately from on-time ones.

Reminders that get out of the way

A morning nudge, an evening planner, and an evening check-in. Yes/no and quick-reply actions live right in the notification on iOS and Android.

Streaks & stats

See your current streak, longest streak, on-time percentage, and completion rate in a calendar view. A grace period means a busy day doesn’t wreck your momentum.

All your devices

iOS, Android, and the web on day one. Pair devices instantly with a QR code. Sign in with Apple or Google when you’re ready to back things up.

Works offline

Add or check off tasks anywhere. Your data syncs the moment you’re back online.

Privacy by default

No accounts required to start. Export your full history as JSON any time. Delete your account from the app — for real.

Get the app

One Thing is launching soon. Add yourself to the early-access list and we’ll let you know when builds are available for your platform.

App Store Google Play Open the web app