Start with one small thing
A line about lunch. A thought before bed. Open your journal and write, even when you're offline.
A little space for your everyday
Ordinary days.
Stories worth keeping.
A thought, a photo, a feeling. Give the little moments a home in ONEDiary, and come back to them whenever you like.
Free on Android · Start without an account
- Write offline
- Keep a photo
- Name the feeling
- Sync when you choose
Make a little room for yourself
A few words today.
A little more of you to remember.
No perfect sentences needed. Just a quiet moment to notice what made today yours.
Keep the details close
Add the photo, the place, and the feeling. Little details help bring a day back.
Find your way back
Browse the calendar, search your words, or follow a tag to a moment you want to revisit.
Find your way back
Your days, page by page
A journal that feels
easy to come back to.
From a quick note to a thoughtful look back, there's room for every kind of day.
01
Your days, gathered together
Scroll through your entries and find a memory with search.
02
More than words
Give a moment its photo, place, mood, and tags.
03
A little spark for reflection
Find a thought to write about, rediscover a memory, or revisit a recent photo.
04
A fresh way to reflect
Explore your writing with optional AI reports and diary chat.
At your own pace
Your journal.
Your choices.
Start with a journal on your device. Choose whether to add sync or AI reflection as you go.
Just open and write
Write and read locally without an account or internet connection.
Bring your journal along
Sign in and enable Data sync to use your journal across your signed-in devices.
Reflect when you're ready
Gemini-powered reports and chat access your diary only with permission. Reports need at least seven entries.
Before your first page
A few things you might wonder.
Getting started, writing offline, and making your journal your own.
What is ONEDiary?
ONEDiary is an Android journal app by Soosu Studio, Inc. It combines offline writing, photos, places, moods, tags, calendar and search tools, optional cross-device sync, and AI-powered reports and diary chat.
Does ONEDiary work offline?
Yes. Writing and reading work on your Android device without an internet connection. Data sync, share links, and AI features require an internet connection.
Do I need an account?
No account is required for local diary writing. Google sign-in is required when you want to synchronize diary data across signed-in devices.
When does ONEDiary sync my entries?
When you are signed in and Data sync is enabled, ONEDiary automatically synchronizes diary data across your signed-in devices. You can disable Data sync or use Offline mode when you do not want changes sent to synchronization storage.
What does Offline mode do?
Offline mode keeps new changes on your device and pauses Firestore synchronization. Pending changes can synchronize after you leave Offline mode while Data sync is enabled.
How does AI help with journaling?
ONEDiary uses Gemini-powered AI reports and diary chat to identify patterns and support reflection. AI reads diary content only after you allow data access, and a report requires at least seven diary entries.
Is ONEDiary free?
ONEDiary is free to download from Google Play and contains ads and in-app purchases. Premium options remove ads and unlock additional features.
Which devices does ONEDiary support?
ONEDiary is available for phones and tablets running Android 10 or later. An iPhone or iPad version is not currently listed.
One small moment is enough
What would you like
to remember about today?
Open a page. Start with a sentence. The rest can come tomorrow.
Get ONEDiary on Google Play
Android 10 or later · Free download · Contains ads and in-app purchases