The MySwimPro Apple Watch app already automatically detects rep splits using Apple's on-device swim lap detection. But sometimes you want to be extra sure that the split was recorded correctly - the Action Button is the only way to manually mark splits during your swim.
On Apple Watch Ultra series, you can setup the Action Button to mark a rep complete during a guided swim in the MySwimPro app and manually record a split. To do so:
Open the Watch app on the paired iPhone
Select "Action Button"
For Action, select "Workout"
For App, Select the MySwimPro app
After completing these steps, you'll be able to use the Action Button to mark a rep complete. Click the button when you complete the rep (after you touch the wall) to mark a split complete. You will see the split appear on the screen briefly for review.
NOTE: In accordance with Interval Training best practices, splits are calculated from the start of the rep interval (when the watch shows 0:00)
