Notes Tech: 100% local Markdown note-taking, encrypted at-rest. <b>Radical privacy</b> • INTERNET permission explicitly removed via manifest merger (tools:node="remove" on android.permission.INTERNET and ACCESS_NETWORK_STATE) — verifiable post-merge with <code>aapt dump permissions app.apk</code> • No account, no telemetry, no tracker, no advertising • SQLCipher AES-256 database + Android Keystore-sealed key (hardware-backed) • Multi-step panic mode: wipes key + DB + dictation model in seconds <b>Per-folder vaults</b> • Argon2id RFC 9106 passphrase (m=64MB, t=3) or Keystore-bound PIN • AES-256-GCM per note with AAD = note_id (anti-swap) • PIN auto-wipe after 5 failures (device-bound Keystore) • Configurable auto-lock (5 min to never) <b>On-device voice dictation</b> • Local Whisper (.bin model imported manually) • SHA-256 verified at import and before every load • Audio never persisted — wiped after transcription <b>Editing</b> • Markdown with an Edit / Preview switch (headings, lists, links), 500ms debounced autosave • <code>[[Title]]</code> backlinks with autocomplete + "notes linking here" panel • FTS5 + bm25 search, folder filter, configurable sort • ZIP Markdown export (YAML frontmatter, Obsidian/Logseq compatible) <b>i18n FR / EN</b> • Language picker in Settings (FR / EN / System) • Theme picker (Light / Dark / System) • Localized legal pages (PRIVACY / TERMS) <b>Open source Apache 2.0</b> Full 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.