Notes Tech: 100% local Markdown note-taking, encrypted at rest. Written in Kotlin. <b>Radical privacy</b> • No INTERNET permission — verifiable with <code>aapt dump permissions app.apk</code> • 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 <b>Per-folder vaults</b> • 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) <b>On-device voice dictation</b> • whisper.cpp built into the app; Whisper model imported manually • SHA-256 verified at import and before loading • Recordings deleted after transcription <b>Editing</b> • Notes open to be read (Markdown: headings, lists, links); “Edit” to write, autosave • Long press on a note: edit, move to trash with Undo, or delete permanently • A pastel colour per note in the lists (a vault note's only while its vault is open) • <code>[[Title]]</code> 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 <b>Five languages</b> • English, French, German, Italian, Spanish — chosen in Settings • Light / dark / system theme • Privacy policy and terms in the five languages <b>Permissions</b> • Microphone: dictation only, asked when you turn it on • Biometrics: app lock only, gives access to no data <b>Open source Apache 2.0</b> Full and verifiable source code on GitHub: gitubpatrice/notes_tech For thinkers, therapists, students, researchers, writers and jour