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@Lwb89dev Lwb89dev released this 19 Jul 10:25
astraea.v.0.1.0
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Astraea v0.1.0 — First Public Release 🌙

Astraea is a private, offline-first calendar with optional end-to-end encrypted synchronization over Nostr.

Your calendar works locally without an account, an Internet connection, or a central Astraea server. Network synchronization is entirely optional and remains under your control.

✨ Highlights

  • Offline-first calendar — create, edit and manage events entirely on your device.
  • Multiple calendar views — month, week, day and upcoming events.
  • Recurring events — daily, weekly, monthly and yearly recurrence.
  • Local reminders — notifications scheduled directly by the operating system.
  • Timezone-aware events — UTC storage with device or custom timezone display.
  • Light and dark themes — including a privacy-oriented dark default.

⚡ Encrypted Nostr Sync

  • Optional multi-device synchronization over Nostr.
  • Calendar contents encrypted using NIP-44 before leaving the device.
  • Support for Nostr kind 30078 parameterized replaceable events.
  • Encrypted tombstones and NIP-09 deletion requests.
  • Local key generation or existing nsec/hex key import.
  • Support for the Amber NIP-55 external signer on Android.
  • Configurable personal relay for additional backup redundancy.

Note

Relay operators cannot read event titles, descriptions, locations or reminder details. As with all network services, they may still observe metadata such as IP addresses, public keys, timestamps and event sizes.

🌐 Relay Onboarding

The new first-launch onboarding lets you choose exactly which Nostr relays Astraea should use.

Astraea suggests:

  • wss://nos.lol
  • wss://relay.damus.io

These are only suggestions. You can enable, disable or replace them with your preferred relays at any time.

📦 Import, Export and Backup

  • Password-protected encrypted exports.
  • PBKDF2-HMAC-SHA256 key derivation.
  • AES-256-GCM authenticated encryption.
  • Standard iCalendar .ics import and export.
  • Local-first storage using Hive.

📱 Android Widgets

Add your calendar directly to the Android home screen with:

  • Daily agenda widget
  • Weekly agenda widget
  • Monthly agenda widget

🔐 Privacy by Design

  • No Astraea account required.
  • No central Astraea backend.
  • No analytics or advertising SDKs.
  • No mandatory network connection.
  • Private Nostr keys stored through Android secure storage.
  • Release builds use a dedicated signing key and never fall back to debug signing.

📲 Platform Support

Platform Status
Android ✅ Supported
iOS Not configured yet
Desktop Not configured yet

Installation

Download the APK from the assets below and install it on your Android device.

Android may ask you to authorize installations from your browser or file manager. Always verify that the APK was downloaded from the official Astraea repository.

Feedback and Security

This is Astraea's first public release. Bug reports and focused contributions are welcome through GitHub Issues.

Please do not report security vulnerabilities publicly. Follow the private disclosure process described in SECURITY.md.

Built with Flutter and open protocols as part of the Echoes ecosystem.

Thank you for trying Astraea. ✨

Assets 8
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