ContactSyncDuck is a handy app for syncing contact information, such as phone numbers and addresses, across multiple devices. It works with Android and iOS phones and tablets, and can also be used as a standalone desktop app.

The way it works is that you enter the information for a contact, such as your email address or phone number, and then you select the device you want to sync it with. Once you're finished, you can save the information in your device's contact database.

If you're using a tablet or phone, you can also sync with your desktop. This means that you can have all the information on your desktops and tablets, regardless of the device you're using.

To use the app, you need to have the latest version installed on your device. It's recommended to have the latest version of the Android operating system.