This app measures cumulative sun exposure during outdoor workouts, providing a UV Load™ score to help athletes understand its impact on performance and recovery. It integrates with Strava to analyze activity data and offers insights to adjust training strategies.
1.2.0
October 22, 2026
Lots of small improvements to make your UV Load™ experience smoother. • Activity times now show in the local time where you did the activity, just like Strava. A 7 AM run on holiday still reads 7 AM back home. • Choose whether your Progress calendar starts on Sunday or Monday in Settings → Calendar. It follows your phone's region by default. • Progress weeks now count every day correctly around daylight saving time changes. • Logging out now asks you to confirm, signs out of this phone only, and stops that account's notifications on it. • Clearer messages when something goes wrong, including if Strava was connected without access to your activities. • The Welcome back screen moves on by itself. • Cleaner map edges in the feed, plus stability and performance improvements.
MoreUV Load™ is a measurement of cumulative sun exposure during your outdoor activities. It helps you understand how UV radiation impacts your performance, fatigue, and recovery, going beyond a simple UV Index reading.
The app connects to your Strava account to automatically import outdoor activities. It then fuses your route data with hourly UV index and cloud cover information to calculate a unique UV Load™ score for each session.
The UV Load™ score ranges from 0-100 and represents the cumulative UV exposure for a specific workout. It's designed to explain what that exposure is doing to your performance and recovery, similar to a strain score for UV.
Yes, you can get every activity analyzed for free. You also get your first week of cumulative UV Load tracking at no cost.
While other apps measure power or heart rate, UV Load™ specifically quantifies the impact of sun exposure. It provides a unique metric to help you adapt your training based on environmental conditions.
UV Load™ is currently supported on iPhone and iPod devices.
The app was last updated on June 19, 2026, with version 1.0.0. Future updates will likely continue to refine its features and accuracy.
UV Load™ has an age rating of 17+, indicating it is intended for adult users due to the nature of performance tracking and physiological data analysis.
