DAVy - Calendar & Contact Sync

Sync your CalDAV calendars and CardDAV contacts with Android’s built‑in Calendar and Contacts apps. Pay once – no subscription, privacy‑friendly sync for your own DAV server. 🌟 Features • Optimized for Nextcloud CalDAV and CardDAV • Reliable CalDAV calendar sync (RFC 4791) • Reliable CardDAV contact sync (RFC 6352) • Bidirectional sync with Android Calendar and Contacts • Background sync with configurable intervals • Conflict detection and safe resolution • Full and incremental sync support • Backup and restore of app settings 💽 Data Management • Multiple account support (Nextcloud and other compatible DAV servers) • Per-calendar and per-address-book selection • Calendar and address book management from within the app • Deep integration with Android Calendar and Contacts providers • Create, edit and delete events and contacts directly from Android apps • Offline data caching for reliable sync, even with unstable connections 🛡️ Security & Privacy • Encrypted credential storage using Android Keystore • TLS/SSL certificate validation for secure connections • No data collection or telemetry • No third-party analytics or tracking • All data stays between your device and your own server 🎨 User Experience • Modern Material 3 design • Dark mode support • Easy account setup • Per-collection sync control • Multiple account support • Calendar and address book management 🌟 User experience • Modern Material Design 3 interface • Full dark mode support • Guided account setup for typical Nextcloud configurations • Per-collection sync control for fine-grained control over what is synced 🛠️ Work in progress • Planned WebDAV file sync support

• Synology NAS: contacts from Synology Contacts are now imported into the Contacts app • Changed and deleted contacts reach the right address on servers other than Nextcloud • Contacts are downloaded right after adding an account