Comfortable to wear ; Nice OLED display; EDA, ECG, SpO2 and a skin temperature sensor make the Sense unrivalled for health features; Apple Watch-embarrassing battery life ;

Seriously buggy and slow; Data overload can be both vague and confusing; Forces you into selecting a certain watchface for SpO2 measurements ; You need Fitbit Premium to maximise it;

If you're specifically in the market for a watch to help monitor your health - and you're happy to pay the monthly subscription for the extra insights - then the Sense is a really great device with so much data.

Solid and premium design; Lovely vibrant display; Easy to use; Fitbit app is brilliant; Good accessory collection; Great sleep tracking; Spotify support; Great health features

Heart-rate sensor slow to respond; Smartphone notifications pointless; No Google Assistant yet; Limited third-party app support; Fitbit Pay support from banks is minimal; Lots of features locked behind Fitbit Premium

If you're specifically in the market for a watch to help monitor your health - and you're happy to pay the monthly subscription for the extra insights - then the Sense is a really great device with so much data. But if you're in the market for a smartwatch or fitness watch in general, however, the Fitbit Sense is currently outshone by its competitors.

Solid and premium design; Lovely vibrant display; Easy to use; Fitbit app is brilliant; Good accessory collection; Great sleep tracking; Spotify support; Great health features;

Heart-rate sensor slow to respond; Smartphone notifications pointless; No Google Assistant yet; Limited third-party app support; Fitbit Pay support from banks is minimal; Lots of features locked behind Fitbit Premium;

Proactive. Thanks to ECG, heart rate, SpO2 and temperature sensors, Fitbit Sense currently is one of the most advanced wearables in terms of health monitoring. We have taken a close look at this smartwatch and its health functions in our review.

If you are looking for a smartwatch with an ECG function, the Fitbit sense is currently one of the o...

If you are looking for a wearable with specialized fitness features, then this is a good option

Plenty of new health related features and good battery life go together to make a solid alternative to fitness tracking rivals

Looks great; Comfortable to wear; Innovative health features;

Not all new features ready at launch; SpO2 watch face is fiddly to use;

Plenty of new health related features and good battery life go together to make a solid alternative to fitness tracking rivals

Looks great; Comfortable to wear; Innovative health features;

Not all new features ready at launch; SpO2 watch face is fiddly to use;

In the era before modern smartwatches, Fitbit's name became synonymous with wearable fitness trackers. Full-fledged smartwatches have become the norm as consumers have demanded more and more from wearables, and Fitbit stepped in with the Ionic and Versa smartwatches a few years ago.

Display It's sharp enough, gets bright outdoors, and Fitbit does a good job of hiding the bezels; Meaningful Fitbit OS improvements More reliable notifications, better shortcuts, always-on display, and more; Battery The Sense lasts the better part of a week (without always-on display).

Sensors The EDA and SpO2 sensors are annoying to use, and I don't know that I believe the numbers; Music Music storage only with Deezer and Pandora Plus, controlling playback on a phone requires extra steps; The "solid state" button It's so much less easy to use than a real button.

The Fitbit Sense adds a whole slew of sensors to the Fitbit lineup to track everything from stress to blood oxygen levels, temperature, sleep and even has an FDA-cleared electrocardiogram (ECG or EKG). On top of all that, the $329 (£299, AU$499) Sense also doubles as a regular smartwatch and fitness tracker. And while the Sense still has fitness at its core, it wants to be your daily wellness coach now, too.

The Sense tracks your stress, temperature, blood oxygen and sleep. But interpreting all this data can be puzzling.

Always-on screen is bright and easy to see; Detailed sleep analysis; ECG is easy to use; Built-in GPS; Google Assistant is versatile;

Stress tracking doesn't tell you much yet; No onboard music storage; Not as responsive or fast as other smartwatches;

For all-round physical and mental health tracking, the Sense is the Fitbit with it all.

Stress tracking; Great design and display; Calls from wrist; Fitbit app;

Non-buckle wrist strap; Some metrics for paying Premium subscribers only;