A:AnswerThe SE doesn’t have ekg capability, so while you can download an app, you’ll want the Apple Watch series 7 (or one of the series just not the SE) so it can actually track it
A:AnswerUnfortunately no. If you misplaced your iPhone. Your watch can ping it just by swiping up on your watch and click on the vibrating phone and it will make a sound if it is in your area. If you ping it and you do not hear a sound, I suggest looking in areas you make have misplaced it. If not, use the Find my app to look for your phone
A:AnswerIt allows for you to start it anytime within 3 months of purchase. For example, I bought it but didn’t want to activate until my next gym membership started. I bought it Black Friday and I was allowed until late Feb. to activate it and still get the full trial
A:AnswerGive a try to the Apple Watch, I think it is the best option that in consideration the native sync with iPhone. Watch is reliable, robust design, there are some interesting apps developed for fitness purposes.