Series 6 test: How useful is the new Apple Watch's oxygen sensor?

The Apple Watch Series 6 can measure pulse and blood oxygen levels, as well as do an ECG reading. In practical tests, the results were largely consistent with the kinds of pulse oximeters you'd find in a hospital. — Christoph Dernbach/dpa

While millions suffer under a virus that hits the respiratory system, Apple has launched a new watch that may be able to detect respiratory problems with an oxygen sensor. We tried out the new Series 6 and its cheaper Watch SE counterpart to see how useful the new features are.

You can hardly tell the difference between newer models of the Apple Watch at first glance. The familiar old rounded square of black with a single crown has changed little in recent years.