How much better than the Apple Watch Series 9 is the Series 10? We explain what's different and whether you should upgrade, or take advantage of a deal on the older model.

Another way in which the Series 10 beats the Ultra is charging time, and this is something that's worth expanding on. Apple says that the Series 10 can charge from 0 to 80 percent in just 30 minutes (as opposed to older models which achieve the same feat in 45 minutes, whereas the Ultra models get there in an hour).

I used the Apple Watch Series 10 for over a week, and temperature tracking doesn't show up in Vitals in the iPhone's Health app - here's why.