Garmin Express is a computer application for easily setting up, registering and managing your Garmin device. Redeem a Voucher. Activate your maps or services with a voucher or product key. Download Content. Manage free and paid content, including Connect IQ apps and accessory maps.<br><br>If you have already paired another device with the Garmin Connect Mobile app, you can add a new device from the app settings menu. Open the Garmin Connect Mobile app. From the settings menu, select Garmin Devices > Add Device. Follow the on-screen instructions.