Garmin Express is used to keep the Garmin devices up to date with the latest features provided by the company. It helps to register the product; upload maps; sync fitness data through Garmin connect with several compatible devices and perform Garmin Express updates. It is available for both operating systems; namely, Windows and macOS. It may not be used with handheld devices such as mobile or tablet. Usually, Garmin express notifies you whenever a fresh update is available for your specific Garmin device.