1. Blood Oxygen app measurements are not intended for medical use, including self-diagnosis or consultation with a doctor, and are only designed for general fitness and wellness purposes.



2. The ECG app and irregular rhythm notification require the latest versions of watchOS and iOS and are not intended for use by people under 22 years old. The ECG app is available on Apple Watch Series 4 or later. The irregular rhythm notification is not designed for people who have been previously diagnosed with atrial fibrillation (AFib).



3. Compared with Apple Watch Series 3.



4. Apple Watch Series 5 and Apple Watch Series 3 have a water resistance rating of 50 meters under ISO standard 22810:2010. This means that they may be used for shallow-water activities like swimming in a pool or ocean. However, they should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth.



