Garmin's vivosmart 3 fitness tracker tried some interesting things, but it didn't follow through so well on all of them. This year, the company not only needed to make up for the vivosmart 3's faults, but also create something to go head to head with the upcoming Fitbit Charge 3 .

Thin; lightweight design OLED display is much better than the vivosmart 3's Accurate fitness tracker overall Advanced sleep metrics are very useful Body Battery is useful for determining how tired/energetic you are Pulse ox sensor is nice to have on a lower-end tracker 5ATM water resistance Garmin...

No phone-to-GPS tethering option Narrow display can be difficult to use Pulse ox sensor is sometimes off; doesn't take readings all night

Tracks steps, mileage, sleep, heart rate, pulse ox and more. Can link most apps and phones so that your notifications come right to your wrist. Helpful for home monitoring and not missing a text when you're stuck in a meeting. Afraid to sleep in

This new tracker has the common features (sleep stages, heart rate, stress) and the new Body battery that is very interesting and also pulse ox. I already own the Fenix 5 & Vivosport, I highly recommend it!

Coming from a Fitbit Alta HR, the Garmin vivosmart 4 feels better and lighter on my wrist. I like the Garmin Connect app better than the Fitbit app. Its not perfect but Im enjoying it more than the Fitbit. Battery life has been good.

I bought this watch a month ago, it has some really good features rest sleep and fitness I absolutely love this watch it's so easy to use, very easy to pair up to your phone.

I bought this a month ago and love it! it does everything i need. Was primarily purchased for swimming as previously had the fitbit 2 however the fitbit doesnt have the time or heart rate.

Only used it for couple days then have to wait for birthday to come. Halford's asked for review for chance to win ￡100. Seems good. I like the feature of stress level I think I'm actually more stressed than I released and also have lower oxygen levels in my blood than the normal healthy range hoping...

The Garmin Vivosmart 4 is a simple, slimline, swimproof fitness tracker that allows you to monitor activities, count your steps, check your heart rate and track your sleep.

Slimline and swimproof; Heart rate monitor; Range of modes

Screen is pretty small; No GPS

Fitness tech companies, particularly Fitbit and Garmin, want to monitor the level of oxygen in your blood. It's a metric that could help spot signs of sleep apnea and other breathing-related problems, so companies have been scrambling to perfect their SpO2 sensors and incorporate this data into...

Attractive; lightweight design; Informative Body Battery metric; Great battery life; even with SpO2 sensor on during sleep; On-device music controls; Works with Android and iOS devices; Syncs with Apple Health

Not as many on-device workouts to track; No connected GPS; No NFC for Garmin Pay; Few communication tools (only Android users will get quick replies for messages); No female health tracking features; Cannot switch out bands

The £119/$129 wearable is a direct challenge to the new and is thinner and lighter than its predecessor, and is more stylish thanks to the metallic accents around the display. The new tracker, which succeeds the excellent , also promises a week-long battery life and water resistance, making it safe...