We’ve recommended the OnePlus Watch 2 as a great alternative to Google and Samsung smartwatches since its debut, and the Watch 3 builds upon it with small, but meaningful upgrades. It retains everything we loved in its predecessor, like dual-frequency GPS and long battery life, but now adds Google Gemini, a rotating crown that scrolls, and video watch faces. The company also added its 60S Health Check-In, which provides a quick snapshot of your heart rate, blood oxygen levels, mental…