Yes, the SkyCaddie SX550 golf GPS device requires a subscription to access its full range of features and functionality. The device comes with a free trial of the SkyCaddie Membership, which provides access to course maps, updates, and other features. After the trial period, users will need to subscribe to continue using these features. SkyCaddie offers different subscription options, including annual and monthly plans. It’s worth noting that without a subscription, the device can still provide basic distance measurements to the front, center, and back of the green, but it won’t provide more detailed information and features that require access to the SkyCaddie database.