Secure, End-to-End encrypted and journaled personal information (e.g. contacts and calendar) cloud synchronization and backup for Android.
It creates a new account on your device to which you can save contacts and calendars. These are then synchronized across your devices in a secure way while maintaining a complete history of your changes both locally, and securely on our servers. After setup, you won't even know it's there. You just keep on using the same contacts and calendar apps you were using before.
There are no reported vulnerabilities