Our Take
The Polar Grit X Pro is a rugged multisport GPS watch aimed at serious outdoor athletes — trail runners, hikers, cyclists, and triathletes. Built to military durability standards, it sits in the premium segment competing with Garmin's Fenix series and Suunto's 9 range, offering a strong emphasis on training load management and recovery guidance rather than smartwatch features.
Key Features
Sapphire crystal glass lens and MIL-STD-810H durability rating for resistance to shock, temperature extremes, and humidity
Built-in barometric altimeter, compass, and GPS with multi-band GNSS support for improved positional accuracy in demanding terrain
Polar's Hill Splitter feature automatically detects and segments uphill and downhill sections during outdoor activities
FuelWise smart fuelling assistant offers nutrition and hydration reminders based on effort and duration
Nightly Recharge and Sleep Plus Stages track recovery and sleep, feeding into a daily readiness score
Battery life rated up to 40 hours in training GPS mode, with an extended battery mode available for ultra-endurance events
Our Verdict
The Grit X Pro suits dedicated outdoor and endurance athletes who prioritise recovery insight, build quality, and training analytics over smartwatch bells and whistles. If you want deep physiological feedback and a watch that'll survive punishment, it's a strong choice. Those wanting richer navigation tools or app ecosystems should weigh up Garmin alternatives carefully.