One Thing

One Thing is a precision-built habit tracker designed for one purpose: to help you show up every day for the single habit that matters most.

Pick one habit. Mark it done. Keep the streak alive.

Why “one thing”?

Most habit apps try to do everything. This one helps you do one thing consistently.

What you can do

Create your habit in seconds

Stay on track daily with a simple Done button

Build a streak that’s easy to see and satisfying to maintain

See your history in a calendar view

Get reminders (optional) so you don’t miss a day

Home screen widgets to check your streak at a glance

Celebrate milestones as your streak grows

Switch habits when you’re ready, while keeping a record of past habits

Private by default

Your habit data stays on your device. No account required.

If you want, tell me whether you want the store listing to lean more minimal/industrial or more warm/motivational, and whether you want to mention Pro/subscription features explicitly.