SUP is a fun and easy iPhone app for tracking your stand up paddle boarding and kayaking activities. With SUP, you can email or post to Facebook your results, including a route map of your activities. The app provides several advantages over most other GPS-based apps. It is easier to use with an auto-pause feature and does not require WiFi or cellular connection. No logon is required, and all data is stored locally. You can also record waypoints with optional photos and trace your way back. The app even has a GPS auto shut-off battery saver feature. SUP can be resumed if terminated for any reason.

Just tap "Start" when you are at your SUP or kayaking launch point, and the app will "wait" for you to start your activities. No account setup or registration is required, and SUP operates in the background, allowing you to use your iPhone for other tasks. The app has an auto-pause feature that calculates your average speed based on the time you are actively moving.

With SUP, you can set a "Return Time" or select "Back by Dark" to ensure you get back on time. The app alerts you when it is time to head back and displays your current speed and estimated time of arrival back at your starting point. You can save and share your activities, including route maps and activity details. The app also helps you mark waypoints and include photos with each waypoint, making it easy to share information about hazards or points of interest.

SUP is very easy to use and provides accurate information about your activities. No account setup or registration is required, and it displays time, distance, and calories. The app also saves battery with its auto-end feature and offers metric/US units for worldwide support. Please note that continued use of GPS running in the background can decrease battery life, and SUP is designed to be used with a waterproof case, not with an unprotected iPhone.