Multiple functions that help you navigate training, recovery and relaxation ; Durable construction ; Trail-specific features

Hefty price tag, especially if you go for a non-standard strap ; Not the most comfortable watch to wear during the night

There are many features and training tools to love on the Polar Grit X, especially the extra insights that trail and mountain athletes are going to benefit from, such as Hill Splitter, FuelWise and WeatherWatch. Weighing 64g, it’s lighter and smaller...

Light design gives it more running watch feel ; Useful fuelling smart assistant ; Reliable sports tracking

Navigation features bit underwhelming ; Buggy Hill Splitter feature ; Battery life drain outside of tracking

As a sports watch option for the lovers of the outdoors, the Grit X does a decent job of it, but there’s certainly room for some of its more unique features to grow. Hopefully they will.

Excellent fuelling recommendations ; Best sleep and recovery insights going ; Recovery-based workout recommendations

No maps for navigation ; Heart rate lags and surges ; Limited every day battery life

If you’re an urban dweller who occasionally ventures into the wild for longer endurance adventures, the Grit X packs a lot of strong features for the price

Lots of useful health insights ; Huge variety of sports profiles ; Rugged ; Fleshed out health tracking ; Incredible battery life ; Training recommendations

Extremely limited smartwatch features ; Interface can be unintuitive ; No automatic activity detection ; Sleep detection can be hit or miss ; Somewhat large and potentially uncomfortable ; Not as accurate as some of the competition ; A little pricey

The Polar Grit X is a comprehensive and mostly accurate fitness tracker, but may not appeal to more casual users.