Coros has pushed a new firmware build, version 3.1908.0, to its Pace 4, Apex 4, Pace 3 and Dura watches, adding two features aimed at runners who train on hilly terrain and want a better record of what they did once they are home. The headline addition is climb alerts, which show a runner's progress and elevation gain through a climb as they move up it — a feature Coros has offered on the cycling side of its software for longer than it has on the running side.
The second addition, an Adventure Journal Timeline, is a shareable, chronological view of a runner's activity history, presented more like a log a runner might keep themselves than the metric-dense training summaries GPS watches usually produce. It sits alongside a smaller but useful change for anyone who trains with a power meter: third-party platforms can now pull power balance data — the left-right split in a runner's power output — directly from Coros watches rather than needing a separate sensor feed.
The update lands a week after Coros put the Pace 4 Pro on sale at £389, and only weeks after the standard Pace 4 picked up full offline mapping in a September software update, extending a run of releases that has moved unusually fast even by the standards of a category where firmware updates are routine. Where Garmin tends to bundle changes into larger, less frequent releases, Coros has increasingly shipped smaller features on a near-weekly cadence this year.
That pace matters because the hardware gap between the leading GPS watch brands has narrowed. AMOLED screens, multi-band GPS and, increasingly, offline mapping are now available across several brands' watches at overlapping price points, which pushes more of the competition onto software: how often a brand ships new features, and how useful those features are once a runner is actually out on a run rather than looking at a spec sheet.
None of the individual features in this update is transformative on its own — climb alerts exist on rival watches, and journaling tools are a crowded space among fitness apps generally. What is notable is the frequency: three substantive Coros software updates inside a month, arriving in the same week Garmin pushed its own firmware refresh to the Fenix 8 and Forerunner lines, adding voice commands and a handful of niche sport modes. The watches are converging in what they can do; increasingly, the story is how often a brand bothers to ship it.