Wed · 21 May
Long day. Said the thing I’d been putting off.
One Line Diary
One line a day. That’s it.
A private diary that stays on your iPhone. Write a sentence about your day, note how you felt, and let the streak grow. Nothing is ever sent to us — because there’s nowhere for it to go.
Private by design — not by promise.
One Line keeps a diary the old-fashioned way: in one place, on paper you hold. Here that paper is your phone — and nothing about it phones home.
No account
Open and write
No email, no sign-up. An anonymous journal lives on your device the moment you start.
No middleman
It never reaches us
We run no servers of our own. Your journal stays on your device, or syncs only to your private iCloud if you choose — never to us.
No AI
Your words, only yours
Nothing you write is read by a model — ours or anyone else’s. A diary, not a data set.
No tracking
Nothing is watching
No analytics, no ads, no third-party SDKs, no advertising identifier. You write unobserved.
No back door
We can’t read it
Because nothing reaches us, we genuinely cannot see, recover, or hand over your entries.
Fully yours
Keep a copy, always
Export everything to JSON or CSV, and edit or delete any entry, any time. You stay in control.
The page is the product.
No cards, no chrome — just the date, your words, and a hairline between days. Writing is the whole point, so everything else gets out of the way.
Everything a diary needs. Nothing it doesn’t.
Small, fast, and private by design.
A line a day
One sentence, one tap. The blank page is the whole app — no feed, no clutter.
Five-point mood
Mark the day Terrible, Meh, Okay, Great or Amazing, and watch the shape of your weeks emerge.
Speak your line
On-device dictation turns talking into writing. Nothing is sent away to transcribe it.
Photos
Attach up to five photos to any day — remember how it looked, not just how it read.
Streaks
A quiet count that rewards showing up. Miss a day; simply begin again.
Calendar & search
Jump to any date, or find a memory by a single word — instantly, all on device.
Daily reminder
One gentle nudge at a time you choose. No badges, no nagging.
Home-screen widget
Today’s line, one glance from your Home Screen.
Face ID lock
Optional Face ID, Touch ID or passcode keeps your diary for your eyes only.
Light & dark
Paper by day, ink by night — follows your system, or pick one.
Export anytime
Your words are yours. Export everything to JSON or CSV whenever you like.
iCloud sync
Optional. Back up and sync your journal across your Apple devices through your own private iCloud — never our servers.
Your diary stays on your phone, and only you can read it. Turn on iCloud Sync to back it up to your own private iCloud and keep it across your devices — or export anytime. Either way, your words are yours to keep.
Start your line today.
Free. Private. No account. Just you and the day.