✒️ OneLine for iPhone

One honest line a day. A five year diary you'll actually keep.

Write one line about today. Next year, read it back on this exact day — and watch the years stack up underneath each other.

Download OneLine on the App Store

Why one line works when journals fail

Most journals die in week two because a blank page every night is a chore. One sentence isn't. And the reward compounds: from day 366, every entry you write sits above the line from a year ago — the small, specific, forgotten stuff that turns out to be your actual life.

What OneLine does

One line per day. A single prompt, a single sentence. Ten seconds before bed.
On this day, last year. Yesterday's you, one year older, right under today's empty line.
Private and offline. No account, no cloud, no tracking. Your diary never leaves your iPhone.
Export any time. Your words are yours — take them with you.

Support & common questions

What is a one line a day journal?
A journal with a single sentence per day. The payoff arrives a year later, when today's page shows this exact date last year. It's the lowest-effort journaling habit that sticks.

Where is my journal stored?
Entirely on your iPhone. Nothing is uploaded anywhere. Deleting the app deletes your journal, so export first if you're switching phones.

How do I cancel my subscription?
iOS Settings → your name → Subscriptions → OneLine → Cancel. Your Pro features stay active until the end of the paid period.

How do I restore Pro on a new phone?
OneLine → Settings → Restore purchases (same Apple ID).

I found a bug.
Email us — we read everything and aim to reply within 2 business days.