Private by default
Your diary is stored on your device. Nothing is uploaded automatically, so your writing stays under your control.
Private diary for Android
Keep your inner life private, useful, and close.
ONEDiary keeps your journal offline-first, protected on your device, and easier to understand with thoughtful AI summaries.
4.5 / 5.0
Based on 1,490 reviews
Offline-first
Write without an internet connection
Encrypted
Designed around device privacy
AI insights
Reflect on patterns in your days
What it does
A cleaner daily record, without giving up privacy.
Designed for the habits people actually keep: quick writing, context-rich memories, and calm review at the end of the day.
Context-rich memories
Record your day with photos, places, moods, and notes that make memories easier to revisit.
Thoughtful AI summaries
Use AI to notice emotional patterns, summarize your day, and help you reflect with less effort.
Fast daily capture
Open, write, attach, and move on. The interface stays simple enough for everyday use.
Privacy model
Built around the phone in your hand.
ONEDiary treats your diary as personal data first, then adds convenience around that boundary.
Local storage first
Your writing is available even when the network is not, which keeps the core diary habit dependable.
You choose what leaves
Backups and sharing are intentional actions, not the default behavior of the diary.
AI supports reflection
Summaries and insights are there to help you understand your days, not turn your journal into a feed.
Screenshots
See the app before you install it.
The interface keeps writing, photos, mood, and AI review close together without adding clutter.
Questions
What to know before you start writing.
A clear look at how ONEDiary handles offline writing, privacy, AI reflection, and the context you add to each entry.
Does ONEDiary work offline?
Yes. ONEDiary starts with writing and reading on your Android device, so you can keep a diary without an internet connection. Backup and sharing are separate actions you choose.
What makes ONEDiary private?
Your diary is local-first and is not uploaded automatically. ONEDiary is designed so personal writing, photos, moods, and reflections stay under your control.
How does AI help with journaling?
AI helps summarize entries and reveal emotional patterns so reflection takes less effort. It supports understanding your days rather than replacing your own writing.
Can I add context such as photos, places, and mood?
Yes. ONEDiary can keep writing, photos, places, moods, and notes together, making each entry easier to revisit later.
Start a diary that stays yours.
Download ONEDiary for Android and build a private record of your days, one entry at a time.