One to Multi-Account and Two - way Synchronization: This smart calendar allows one device to link with all family members' phone accounts. It features two-way sync. On the device, it instantly shows events added by each member on their apps. Meanwhile, all family members' arrangements on device are updated on their apps in real time. Say, when you plan meals in the calendar, every family member can view it in real-time on their mobile device accounts. When a family member updates their schedule on their mobile device, it will also be immediately synchronized and displayed in the calendar.