The blood-oxygen sensor doesn’t do all that much right now, but it likely will in the future. Our pick: Health and fitness buffs will definitely want to spring for the Series 6 and the blood-oxygen sensor, but the SE has a healthy array of sensors and features for its price. Unlock your iPhone while wearing a mask in iOS 14.5. The upcoming watchOS 8, so you’ll be able to use any model to It’s also the only watch Apple sells that has the electrical heart sensor that was introduced with the Series 5 last year.Īll three watches support watchOS 7 as well as Oxygen saturation can help manage heart failure and asthma, as well as early respiratory issues stemming from the flu or coronavirus. Most notably, it has a SpO2 blood oxygen sensor that works with a custom algorithm to use light to measure the oxygen saturation of blood both on-demand and throughout the day. If you upgrade to the SE, you’ll get a compass and international emergency calling, but to get the latest sensors you’ll need to spring for the Series 6. The on-screen animation while taking blood-oxygen readings are very cool. You also get 32GB of storage on the SE and Series 6, versus just 8GB on the Series 3. Additionally, the microphone will track decibels in the Noise app and the accelerometer is used to detect falls, both of which aren’t available on the Series 3 watch. Notably, the SE and Series 6 have a second-gen heart sensor for greater accuracy as well as an always-in altimeter for all-day tracking. First, let’s start with what all three watches have: Here’s where the watches really set themselves apart. Whether you need it is up to whether you want to leave your phone behind or buy one for your kid, but we’re definitely higher on cellular than we once were. Plus carriers are charging less than just a couple of years ago, so cellular is becoming more intriguing. Our pick: We’ve never been huge fans of the $100 upcharge or the monthly carrier fee for the Apple Watch’s cellular connection, but the new Family Setup feature is intriguing, as is the SE’s cheaper LTE price (see below). That’s just enough to ensure you need to charge it once a day, which could be tricky if you want to track sleep. If you’re using cellular a lot, your battery life will vary a bit, but for the most part, all three watches will get roughly 18 hours of battery life.

Apple watch series 3 gps 38mm vs 42mm