You can sync your contacts/cards between ScanBizCards app/devices; however, as of now, this functionality is limited to the same platform.
This means if you are using your ScanBizCards app on an iOS device, you can only sync your contacts/cards with another iOS device. In this case, you’ll need to sync your device with iCloud linked to the same Apple account.
The same applies to the Android version of the app; wherein you need to sync your device with Google Drive having the same Google account.
To sync between iOS devices and Android devices, please refer to our FAQ: How will I backup my contacts?