Rob ter Horst says that Apple watches are the most accurate onces: But which scientists exept for Rob ter Horst use Apple watches for scientific studies? Peter Gamma from www.petergamma.org will use 3 channel ECG devices instead of Apple watches. For the same price as an Apple Watch Series 9 at Digitec: https://www.digitec.ch/de/s1/product/apple-watch-series-9-41-mm-aluminium-nur-wlan-sm-sportuhr-smartwatch-38609200?supplier=406802&utm_source=google&utm_medium=cpc&utm_campaign=PROD_CH_PMAX_CSS_Cluster_9&campaignid=20501673545&adgroupid=&adid=&dgCidg=CjwKCAjwnv-vBhBdEiwABCYQA8CY8dZ92D8TNvU3JT4DcgKVedaR9gR5zP0ZEkxdcfmlzWN71pTrsBoCLWIQAvD_BwE&gad_source=1&gclid=CjwKCAjwnv-vBhBdEiwABCYQA8CY8dZ92D8TNvU3JT4DcgKVedaR9gR5zP0ZEkxdcfmlzWN71pTrsBoCLWIQAvD_BwE&gclsrc=aw.ds He can …