Meiso

A minimalist task management app built on the Nostr protocol.

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About

Meiso (瞑想) is a simple, privacy-focused task management app inspired by TeuxDeux's clean design. Built on the Nostr protocol with end-to-end NIP-44 encryption, your tasks are synced across devices without any central server.

Features

• Three-Column Layout: Today / Tomorrow / Someday organization
• Subtasks: Parent-child task relationships with inline editing
• Recurring Tasks: Daily, weekly, monthly, yearly patterns with flexible intervals
• Personal Lists: Create custom lists to organize tasks by category
• Image Attachments: Blossom / NIP-96 image upload with server picker
• Hide Completed Tasks: Declutter your view with a single toggle
• Nostr Sync: Multi-device synchronization via Nostr relays
• Privacy First: NIP-44 end-to-end encryption for all tasks
• Amber Integration: Secure key management with Amber signer support
• NIP-89 Client Tag: Identify events published by Meiso (opt-out in Settings)
• Relay User-Agent: WebSocket handshake includes meiso/<version> for relay analytics
• Dark Mode: Easy on the eyes day and night
• Multi-Language: English, Japanese, Spanish support
• Drag & Drop: Intuitive task reordering with drag handle
• Pull to Refresh: Quick sync with a simple gesture
• Go CUI: Terminal-based task management with bidirectional Nostr sync

Screenshots

Installation

Zapstore (Recommended)

Download Meiso from Zapstore - the Nostr-native app store.

Build from Source

# Clone the repository
git clone https://github.com/higedamc/meiso.git
cd meiso

# Install dependencies
fvm flutter pub get

# Build for Android (production flavor)
./generate.sh
fvm flutter build apk --flavor production --release

Tech Stack

• Frontend: Flutter 3.x with Riverpod state management
• Backend Logic: Rust with flutter_rust_bridge
• Protocol: Nostr (NIP-44 encryption, Kind 30001 for tasks, Kind 30078 for settings)
• Storage: Local-first with Hive, synced via Nostr relays
• Architecture: Feature-based Clean Architecture
• CUI: Go (terminal companion app with Nostr sync)

Architecture

Collaborative Lists Encryption

Shared lists use the shared-v1 scheme: each list gets its own Nostr keypair G, shared out-of-band with every member. Tasks are addressable Nostr events signed by G, with content self-encrypted to G via NIP-44 v2. Adding a member just means handing them nsec_G. Removing a member does not currently revoke access — there is no key rotation on removal, so a removed member who already has nsec_G keeps the ability to decrypt the list. Event authenticity is guaranteed by Nostr's Schnorr signatures, but only proves "signed by someone holding nsec_G," not a specific member.

→ Full design doc: docs/COLLABORATIVE_LISTS_ENCRYPTION.md

Documentation

• Development Roadmap - Upcoming features and MLS group lists
• Clean Architecture Guide - Architecture details
• Release Guide - How to publish to Zapstore (Japanese)
• Go CUI MVP Spec - macOS supplemental CUI scope and auth model
• Go CUI Operation Guide - build, E2E flow, and future TUI reuse strategy

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License.

Author

Kohei Otani
Nostr: npub16lrdq99ng2q4hg5ufre5f8j0qpealp8544vq4ctn2wqyrf4tk6uqn8mfeq

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