Mind Journal: AI Diary & Lock

Mind Journal is a private diary and journaling app with a built-in AI you can ask about your own life. Write a daily journal, lock it with a PIN or your fingerprint, and keep everything on your phone. The AI and the cloud backup are both optional. It works completely offline.

You write your own entries. No daily prompts, no AI asking how your day went. The assistant does nothing until you ask it to.

KEEP A DIARY
Make as many journals as you need: one for work, a travel diary, a private notebook nobody else sees. Choose from 10 paper styles, from a blank page to a ruled notebook to a dot grid. Drop photos anywhere in an entry, change the font, and add a mood if you want one. Write in any language you think in: English, Bangla, Hindi, Arabic, and more.

LOCK IT
Put a PIN on the whole app, or lock one journal separately so nobody can open it even on an unlocked phone. Fingerprint unlock works too. A locked journal stays out of search, stats and reminders until you open it. Your diary is never shared or sold, and locked journals are never sent anywhere.

ASK YOUR DIARY
The AI reads your old entries so you don't have to scroll back through months. Ask it normal questions:
- "When did I last see the dentist?"
- "What did I spend most of my time on last week?"
- "How was March?"
It can write a summary of your month, or a longer review of the last few weeks: what went well, what was hard, what keeps coming up. Turn that into a couple of goals and it tracks them from your entries. While you're writing, it can fix grammar, shorten a paragraph, or turn rough notes into full sentences. It never reads a locked journal.

LOOK BACK
Check your writing streak, your word count, and which journal you use most. A mood calendar shows how your months have gone. "On this day" pulls up what you wrote a year ago.

BACKUP AND EXPORT
Turn on cloud backup and your diary syncs across your devices. Lose your phone and it all comes back (Premium). Export any page or a whole journal as a PDF, save an entry as an image, or download your entire diary as one password-protected file.

REMINDERS, IF YOU WANT THEM
An optional nightly reminder that skips days you've already written on. An optional Sunday recap of your week. Both are made on your phone. Nothing goes to a server.

Mind Journal is free to use. Premium adds the AI assistant, cloud backup and sync, unlimited journals and pages, and every paper style. There's a free trial, and you can cancel anytime.