Suunto Run smartwatch update 3.21.14 brings sharper heart rate tracking and new tools for runners
Suunto is rolling out a fresh firmware update for the Run smartwatch, focusing on more precise heart rate tracking and convenient training features. Version 3.21.14 is a staged release that began on September 30, 2025, and will reach devices over time.
What’s new
– Vertical running exercise mode for targeted elevation-focused sessions
– Two new ways to open shortcuts directly from the watch face for faster access
– Watch finder function, accessible via the Suunto smartphone app, to help locate your device
Key improvements
– Optimized heart rate algorithm for more accurate readings during workouts and daily wear
– Better structured interval training experience, including a refined layout and clearer audio alerts
– Smoother morning notification review for a more seamless start to the day
– General system stability enhancements
How to update
The rollout should install automatically. If you prefer to update manually, go to Settings > General > Software update on your Suunto Run.
Recent context
This is the second software release in September 2025. Earlier in the month, version 3.20.22 added reverse navigation along with expanded options for track running and ghost runner modes.
Availability and price
The update is rolling out in stages, so availability may vary by region and device. The Suunto Run typically retails around $249, depending on the seller and promotions.
Bottom line
With more accurate heart rate tracking, a new vertical running mode, and a handy watch finder, software version 3.21.14 makes the Suunto Run an even stronger choice for runners who want reliable training data and faster access to key features.
