We test smartwatches in the real world, focusing on key features from fitness tracking to connectivity that you’ll use every day. Starting with the watch itself, we check overall performance and responsiveness. Is there any lag when navigating menus? Is the touchscreen responsive? Do apps launch quickly?
Then we check if it has all the functionality you’d expect for the price. That could be everything from music playback controls to cellular connectivity so you can use the watch away from your phone or an always-on display. All smartwatches need to connect to a phone, so we also assess how easy the companion software is to navigate.
Durability and design
Smartwatches are something you wear on your body, so we assess how comfortable they are to wear. We also know that everyone has a different-sized wrist, so we try to see how it fits and feels on a variety of people.
Then we look at how it stands up to wear and tear with daily life. Some smartwatches offer increased durability like dust resistance, or water resistance that’s suited for activities like scuba diving and where possible we’ll test this out for ourselves.
Battery life
Battery life will vary depending on how you use a smartwatch, so we test battery life with a few standard tests. We see how long it generally lasts on a single charge with features that represent typical use, like the always-on display, sleep tracking and doing an outdoor workout with GPS.
That small circle is the temperature sensor on the back of the Galaxy Watch 5.
Fitness and health sensor accuracy
We test the accuracy of smartwatch sensors in a couple of different ways. For example, the heart rate sensor is compared against the readings taken from a chest strap, considered the gold standard in consumer heart rate tracking. We compare readings from the watch against the strap for resting heart rate, and heart rate during a variety of cardio-based activities like running or cycling. We check to see how long it takes to connect to a GPS signal when doing an outdoor workout.
Other health sensors, like a blood oxygen sensor, are compared against a pulse oximeter for spot readings where possible.