If you do use an iPhone and enjoy it then the Apple Watch is handy. Some of the Series 1 watches are up on eBay now with the V2 and 3 being wanted by the fanboys. I use my Series 1 and it does a fair bit with the iPhone giving me a good view. It can do quite a lot of other stuff if you don't mind squinting at the teenyscreeny.
If you should buy one try and get the power charging cables included as they are stupidly expensive. Pop a new strap on it and you have a nice watch/tool
