GPX is the standard for sharing hike and bike routes — any app can open it. TCX (Training Center XML) is Garmin's format with extra workout fields like heart rate and cadence.
When to use each
- Share a route with friends → GPX
- Upload a structured workout to Garmin → TCX
- View a route on iPhone/Android → GPX
Import GPX into GPX Viewer. Compare GPX vs FIT.
Try GPX Viewer free
Open shared GPX routes in GPX Viewer on any phone.
