OtterWatts connects to your Strava account and provides AI-powered analysis of your workouts, including activity classification, power analysis, heart rate zones, and long-term fitness trends.
Strava is the primary data source. You can also upload FIT files (from Garmin and other devices), GPX files, and TCX files directly. This means you can use OtterWatts even without a Strava account.
We store activity metrics (distance, time, speed, heart rate, power, route polylines) in a secure database. Activity data is sent to our AI provider (OpenAI) only when generating summaries or chat responses. No data is sold to third parties.
TRIMP (Training Impulse) is a measure of training load that uses your heart rate data to weight harder sessions more heavily. A 30-minute threshold run scores much higher than a 30-minute easy jog. It works across all activity types — running, cycling, swimming.
For runs near standard race distances (5K, 10K, half marathon, marathon, 50K, 100K), we compare your time against all your previous efforts at that distance. P100 means it's your fastest, P0 means it's your slowest. Only running activities count — rides are never matched as races.
The graphs show weekly trends for distance, training load (TRIMP), and average power. Each activity type (Run, Ride, Walk, Swim, etc.) is shown as a separate coloured line so you can track progress per sport.
The chat assistant has access to your actual activity data — totals, averages, recent activities, and running PBs. It can answer specific questions about your training. It won't provide medical advice.
Yes! The free plan includes up to 50 activities, dashboard graphs (3-month range), route maps, race percentiles, and 5 AI chat messages per day. See our pricing page for full details.
Pro ($5/month or $48/year) unlocks unlimited activities, all date ranges, unlimited AI chat, AI activity summaries, 4DP power analysis, and CSV data export. See the pricing page for a full comparison.
Yes. You can cancel your Pro subscription at any time. You'll keep Pro access until the end of your billing period. We offer a 14-day refund policy for new subscribers.
Your data is never deleted when you downgrade. You'll still be able to view all your activities, but some features (AI summaries, extended date ranges, power analysis) will be locked until you upgrade again.
Yes. Contact us and we'll delete all your data immediately. When we add user accounts, you'll be able to do this self-service from your settings page.
Activity data is sent to OpenAI only when generating AI summaries or chat responses. No data is sold to or shared with any other third parties.
OtterWatts Assistant