One Line Diary — remember your life, one day at a time.

Write a few words each day

That is it

No pressure, no templates, no endless prompts

Just one line to capture what matters

Over weeks and months, those small entries add up to something remarkable — a real picture of your life.

OPTIONAL AI REFLECTIONS

Turn on AI reflections and your diary becomes more than a log

It surfaces patterns in your mood, highlights moments you might have forgotten, and gently connects the dots across weeks and months

You stay in control — reflections are always optional and can be turned off anytime.

PRIVATE BY DESIGN

Your entries are encrypted and stored locally on your device

Sync with iCloud on your terms

No account required

No social features

No ads

No one reads your diary but you.

BUILT FOR THE LONG RUN

- Daily streak tracking to build your writing habit

- Works offline, everywhere

- iCloud backup so your entries follow you across devices

- Clean, minimal interface that stays out of your way

- Sign in with Apple for secure, passwordless access

One Line Diary is free to use

Just open it, write one line, and close it

The simplest journaling habit you will ever keep.