The Pace 4 is the watch for runners who want serious training tools without paying serious money for them. At $349 it undercuts most of the competition, and at 31g with the nylon band it's the lightest GPS watch on the market by a meaningful margin. The headline upgrade from the Pace 3 is the AMOLED display: a 1.2" 390x390 panel that's significantly sharper and easier to read in motion than the old MIP screen. Battery life somehow improved as well, with 31 hours in dual-frequency GPS, 41 hours in all-systems mode, which covers most ultramarathons on a single charge and makes mid-race charging a non-issue for most people. GPS accuracy is dual-frequency and solid. In independent testing it tracked consistently against chest strap HR and GPS reference devices across trails, in tree cover, and at altitude. The barometric altimeter reads accurately. Navigation is breadcrumb-only from a loaded GPX. No maps, no topo, no points of interest. If you want offline maps, the Pace Pro is the next step up. If you're already running with your phone or you know your terrain, the breadcrumb is fine and most people won't miss the rest. The training feature set punches above the price: VO2max, training load, pace strategy, hill alerts, Strava and TrainingPeaks integration, and a built-in microphone for voice training notes. No contactless payment, no music streaming, no third-party apps. Coros keeps it purposeful and the battery life reflects that.
