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  • Lumi Diary: Journal with Lock screenshot 1
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  • Lumi Diary: Journal with Lock screenshot 8

About Lumi Diary: Journal with Lock

Lumi Diary is a handwriting notes app and private diary with lock in one place. Write by hand with a stylus or your finger, keep a digital journal of your days, and study with flashcards that use spaced repetition. Works offline, no account needed.

HANDWRITING NOTES & PENCIL DRAWING
• 26 pens and brushes: ballpoint, fountain pen, gel, fineliner, pencil, charcoal, crayon, chalk, marker, highlighter, brush, watercolor, sumi ink, airbrush, calligraphy, neon, glitter, metallic, rainbow and more
• Stylus support with pressure, palm rejection and stylus-only mode, so your hand can rest on the screen
• Shapes that snap into clean lines, plus a ruler and a protractor
• Lasso to select, move, resize, recolor, copy or delete
• Text boxes, photos, stickers and washi tape next to your ink
• Zoom in for fine details, with undo and redo

76 PAPER TEMPLATES
• Lined, college ruled, grid, dot grid, engineering, isometric, hex and blank papers in many colors
• Study papers: Cornell notes, vocabulary columns, kanji and hanzi grids, handwriting practice lines, math, lab report and mind map
• Planner papers: daily, weekly, monthly and yearly pages, habit tracker, kanban, budget, meal plan, sleep, workout and reading log
• Music staff, guitar tab and chord papers
• Generate a year planner with tappable links from year to month, week and day
• Import a PDF and write on its pages; the original file stays untouched
• Export notebooks to PDF or images

VOICE NOTES WHILE YOU WRITE
• Record audio in a notebook or a journal entry, free up to 10 minutes per recording
• Tap a stroke to jump to the moment you wrote it
• Searchable transcript when your device supports speech recognition

FLASHCARDS WITH SPACED REPETITION
• Build decks for vocabulary, languages, exams or anything you want to remember
• SM-2 spaced repetition: rate each card Again, Hard, Good or Easy and review it at the right time
• Lasso part of a handwritten page and turn it into a card
• Import and export decks as CSV, or share a deck with a link
• Daily study reminder and study streak

STUDY TOOLS
• Translate selected text and hear it read aloud
• Floating calculator that works offline and inserts results into your page

DIGITAL JOURNAL
• Rich text with fonts, colors, checklists and quotes when you'd rather type
• Photos, videos, voice notes and drawings in every entry
• Mood tracker with charts, streaks, word counts and a year in pixels
• Calendar and "On this day" memories
• Daily writing prompts, templates, themes, stickers and a home screen widget

PRIVATE DIARY WITH LOCK
• Lock the app with a PIN or pattern, plus fingerprint unlock
• Lock a single notebook or entry; locked pages are blurred in the library
• Your diary, ink and recordings stay on your device
• Back up to your own Google Drive or to a file

ORGANIZE
• Folders, favorites, recents, tags and full-text search
• Grid or list view, sorting and page count badges
• Trash keeps deleted pages for 30 days

MADE FOR TABLETS
• Navigation rail and two panes: browse on one side, write on the other
• Multi-window with drag and drop of photos and text
• Keyboard shortcuts for pages, undo, search, pens and eraser

FREE AND PREMIUM
Lumi Diary is free with ads. The pencil, core pens, most papers, voice notes up to 10 minutes and flashcard review are free. Lumi Premium removes ads and unlocks premium papers, pens, themes, fonts and sticker packs, plus unlimited decks, image cards and longer recordings. Choose a monthly or yearly subscription (yearly includes a 3-day free trial) or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage them in Google Play > Payments & subscriptions.

Terms of Use: https://lumidiary.web.app/terms
Privacy Policy: https://lumidiary.web.app/privacy

What’s new

Version 1.10.0 · Updated November 10, 2026

New: the home screen now shows a slider of 5 random new page templates that rotates every 5 seconds. Tap one to preview it and use it as an editable notebook page.

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