Smartwatches are everywhere, but that doesn’t mean there’s no niche for a dedicated fitness tracker. Sometimes, you want that laser focus on your health over every notification possible. Amazon thinks they can get a foot in the door with the Amazon Halo View. We’ve put it through its paces to see if it can compete for wrist space among some stiff competition. The Amazon Halo View is a delightfully lightweight companion. It comes in at around 21g, which is just slightly more than half the weight of an Apple Watch. It’s quite slim and doesn’t interfere with wrist movements when…