I’m loving the HockeyTracker app for my Apple Watch. While I wonder how accurate it is at times (22.6mph seems a bit high), it provides great insight into workouts on the ice.
I’ll admit, it’s a little weird wearing your watch on the ice but the cuff covers it pretty well. If you are that worried about damaging it, buy a pair of these. Overall, the data is cool to see and it’s interesting to see how you are improving over time.