- Always-on display looks bright even after it’s timed-out
- Measures blood oxygen levels automatically
- Better battery life during runs
- SpO2 data is hard to interpret
- Still requires daily charge with sleep tracking and always on display
The Apple Watch Series 6 feels like it has perfected many of the features I liked about its predecessor. It has a brighter always-on display, a more powerful processor, faster charging and two new colorful options to choose from. But the feature I was most excited to try out was its new sensor that measures oxygen saturation in the blood (aka SpO2) with the tap of a screen. As someone who panic-bought a pulse oximeter at the start of thepandemic and still checks her levels at the first sign of a cough, the thought of having one strapped to my wrist at all times was enough to pique my interest.