In reply to WaterMonkey:
I cannot offer any advice to the OT, but I would like to defend the Apple Watch in the face of the dismissiveness of the replies.
6 months ago I was equally dismissive of the Apple Watch, a consumerist bling statement of the highest order.
Then I was diagnosed with heart disease. So the end of my climbing, cycling, walking, running, life worth living. If you have had this diagnosis, I don’t need to tell you how terrifying this was.
My consultant recommended I get myself a heart monitor, and carefully monitor my heart rate, keeping it below a maximum while carefully starting out with gentle exercise.
Research showed that there was only one accurate wrist monitor available, the Apple Watch. Tests by many reviewers showed it was far more accurate than any other.
So I took the plunge, held my nose and bought one. Over the following months I gradually upped my exercise and activities, constantly staring at my wrist, and to cut a long story short, I summited the Breithorn in July. If one thing helped me more than any other, it was my Apple Watch and the fact that I could trust it implicitly.
Life's back on track.