PolarGrit X2 Pro Premium GPS Smart Sports Watch – Ultimate Outdoor Adventure Watch with Rugged Design, Advanced Navigation, Sports Tracking, and Heart Rate Technology, Night Black

This is a premium watch with solid build quality and battery life. The HR tracking for running seems to work fine. The interface is clean & snappy albeit a bit dated. This is not a watch for getting notifications (though it works) or filled with gimmicks. If you are into detailed training metrics and sleep tracking, Polar's ecosystem seems to have you covered. The offline maps works fine with turn by turn from Komoot. Overall, there is nothing that can justify the price of this watch especially when you have better alternatives from Garmin. But if you want a premium build quality and prefer training metrics and are not into the Garmin ecosystem, this is a great watch.

I have the Polar H10 sensor paired to my phone. I recorded the training session with both the H10 on Flow app and the Grit x2Pro watch (see attached pics). (The short spike down on the H10 reading was due to me disconnecting the sensor for a few seconds to verify that it was not interfering with Grit X2Pro , it wasn't). (The spikes at the end of the Grit X2Pro report were due to me taking the watch off my wrist to see if it was reading H10. It wasn't, and you can see the random HR readings while laying on the desk). The heart rate on the Grit x2Pro is completely inaccurate. At times, the BPM on Grit X2Pro was randomly off by as many as 40 beats up or down. In addition, when the watch is not on the wrist, it sometimes shows as reading some heart rate. I cannot imagine it providing any accurate data if you're using it to track your sleep.It's a cool watch, but don't get it for HR reading.On the bright side, when paired to H10, it seems to be reading it correctly.