Encrypted Markdown notes, 100% local. No Internet permission.

Notes Tech: 100% local Markdown note-taking, encrypted at rest. Written in Kotlin.
Radical privacy• No INTERNET permission — verifiable with
aapt dump permissions app.apk• No account, no telemetry, no tracker, no advertising
• SQLCipher AES-256 database, key sealed by the Android Keystore
• Multi-step panic mode: wipes keys, database and dictation model in seconds
• Optional app lock: a PIN, plus strong biometrics if you wish
Per-folder vaults• Argon2id passphrase (m=64MB, t=3) or Keystore-bound PIN (Android 9+)
• AES-256-GCM per note, bound to its note (anti-swap)
• PIN auto-wipe after 5 failures
• Configurable auto-lock (5 min to never)
On-device voice dictation• whisper.cpp built into the app; Whisper model imported manually
• SHA-256 verified at import and before loading
• Recordings deleted after transcription
Editing• Notes open to be read (Markdown: headings, lists, links); “Edit” to write, autosave
• Long press to select notes, then archive, move, trash with Undo, pin, color or delete them at once
• An Archive for the notes you keep out of your lists
• A pastel colour per note in the lists (a vault note's only while its vault is open)
•
[[Title]] backlinks with autocomplete + "notes linking here" panel
• Instant FTS5 search, find in note with highlighted matches, configurable sort
• Markdown export, one note or a ZIP (YAML frontmatter, Obsidian/Logseq compatible)
• Import of Markdown, text and ZIP files; share text or files from other apps
• Encrypted backup of your notes and vaults, restored without overwriting anything
Five languages• English, French, German, Italian, Spanish — chosen in Settings
• Light / dark / system theme
• Privacy policy and terms in the five languages
Permissions• Microphone: dictation only, asked when you turn it on
• Biometrics: app lock only, gives access to no data
Open source Apache 2.0Full and verifiable source code on GitHub: gitubpatrice/notes_tech
For thinkers, therapists, students, researchers, writers and journalists who want to take sensitive or dense notes without them ever leaving their phone.
WhatsNew:
New: an Archive, grouped by month, in the menu next to the Trash. Archived notes leave your lists and the search, and stay one tap away. Hold a note down to select it, then others: archive, move, trash, pin, favorite, color or delete them all at once (a locked vault must be opened first). Archive is also in a note's ⋮ menu. A new note, or one opened with Edit, now gets the cursor and the keyboard at once.