davdroid 詳細介紹
davdroid 是 android 4+ 上的一個開源的 caldav/carddav 同步應用解決方案。
關鍵特性：
two-way-synchronization (server ↔ client, server always wins)
focused on simplicity, security and privacy
native android 4+ implementation
lightweight application, not cluttered with "features"
flawless integration with device and address book/calendar apps
high-performance algorithms
seperately usable (either caldav or carddav)
free and open-source software (foss)
界面截圖：
