A private, encrypted space for your notes and files — built on Nostr.
Think of it as your personal "Saved Messages": write notes, attach images and files, edit them anytime, and access everything across your devices. A simple and clear chronological order, zero fuss. No plaintext data at rest or in transit.
- Notes — Write, edit, and delete text notes
- Attachments — Store any file type
- Images - Crop, roate and compress images
- Video - Play video files and gifs
- Camera - Capture photo and video from the app
- Voice notes - Record voice notes with a live level meter and pause/resume; recordings are normalized and trimmed of silence
- Transcription - Transcribe voice notes and imported audio on your device with whisper: downloadable models, language choice, and a prompt built from your own tags so hashtags come out right (not available on web)
- Audio - Play audio inline with a real waveform, a draggable cursor and a per-note playback speed; mp3, Ogg Vorbis, Ogg Opus and WAV are decoded for waveforms and transcription
- End-to-end encrypted — Everything (notes, files, metadata) is encrypted with NIP-44 before leaving your device
- Tags - Organize your notes with inline tags
- Search - Search and filter your notes by tags and kind (text, images, videos, voice notes, audio, files, sensitive)
- Sync via Nostr — Your data lives on your own relays; files (larger than 32KB) are stored on Blossom servers
- Multi-platform — Web, Android, Linux, macOS (iOS and Windows builds untested)
- Bunker (NIP-46) — Connect via QR code or
bunker://URL - Android Signer (NIP-55) — Delegate signing to Amber, your key never leaves the signer app
- nsec — Paste your private key directly
- Flutter — cross-platform UI
- NDK — Dart Nostr Development Kit
- NIP-44 encryption, NIP-46 remote signing, NIP-65 outbox relays, Blossom file storage
- whisper.cpp via whisper_ggml_plus — on-device speech to text; models are downloaded from Hugging Face on first use
Building needs a C toolchain (Xcode, NDK, gcc/clang or MSVC): the mp3, Vorbis and Opus decoders used for waveforms and transcription are compiled from source through Dart build hooks.
Xcode 26's clang errors when the deployment target is inferred from multiple sources simultaneously. Fix: patch Flutter's DebugMacOSFramework to pass an explicit -mmacosx-version-min flag.
In $(flutter sdk-path)/packages/flutter_tools/lib/src/build_system/targets/macos.dart, inside DebugMacOSFramework.build(), add before the clang(...) call:
final String deploymentTarget =
environment.defines['MACOSX_DEPLOYMENT_TARGET'] ?? '10.15';Then add '-mmacosx-version-min=$deploymentTarget' to the clang args list, and delete $(flutter sdk-path)/bin/cache/flutter_tools.snapshot to force a rebuild of the Flutter tools.
This patch is overwritten by flutter upgrade and must be reapplied until Flutter adds native Xcode 26 support.
just build_linux produces a plain tar.gz of the Flutter release bundle, the same output as the GitHub pipeline (just gh_build_linux). Beyond the standard Flutter toolchain it needs the dev headers for libmpv and libepoxy (media_kit_video) and FFmpeg (fc_native_video_thumbnail):
- Fedora:
sudo dnf install mpv-devel libepoxy-devel ffmpeg-free-devel - Debian/Ubuntu:
sudo apt install libmpv-dev libepoxy-dev libavformat-dev libavcodec-dev libavutil-dev libswscale-dev
The full list, including the generic Flutter desktop dependencies, is in .github/workflows/linux-release.yml.
just package_linux additionally wraps the bundle into .deb and .rpm packages, same as the GitHub pipeline; it needs fpm (gem install fpm; building the .deb on Fedora also needs dnf install dpkg).
Runtime dependency: the app links the system libmpv and FFmpeg libraries, so the target machine needs mpv-libs (Fedora) or libmpv2 (Debian/Ubuntu), which pulls in the FFmpeg libraries with it.