When you purchase a Garmin lifetime subscription, you will receive lifetime Garmin map update when updates are available. A Garmin map product will be deemed out of 1st service and its useful life to be ended if the updates aren’t downloaded for such product for a period of 12-24 months or more. So we can easily Garmin map update on Garmin express application or on Garmin official website. Google update their Garmin maps in every 3-4 months, so we should also update maps in our Garmin GPS device. It can help us to find new tracks, routes, and waypoints in our area.