Privacy Policy — Trainar

Who we are

Trainar is an AI-powered running coach built and operated by Kastrup Concepts. We connect to your Strava or Garmin Connect account to read your activity data and use it — together with Claude AI — to provide personalized training plans and coaching conversations.

What data we collect

When you use Trainar, we collect and store the following:

Profile data — your name, profile picture URL, and athlete ID from Strava or Garmin Connect.
Activity history — runs synced from Strava or Garmin Connect including distance, duration, pace, heart rate, and GPS metadata.
Training preferences — goals, fitness level, weekly mileage targets, and other settings you provide during setup or in your profile.
Training plans — AI-generated plans created based on your data and goals.
Chat conversations — your messages to the AI coach and the responses you receive.
Contextual memory — a short summary the AI maintains about you to improve continuity across sessions.

We do not collect payment card details. Any payments are handled entirely by Stripe and subject to their own privacy policy.

How we store your data

All data is stored in Microsoft Azure Blob Storage, hosted in the European Union. Your data is stored per-user under a unique internal ID. Access tokens for Strava and Garmin Connect are stored and used only for syncing your activity data.

We use browser localStorage to remember your user ID and consent preference across sessions. If you accept our consent banner, we also load Google Analytics to understand how the site is used. Google Analytics sets cookies on your device — see the Google Analytics section below for details.

How we use your data

Your data is used exclusively to provide the Trainar service:

Analyzing your running history to understand your fitness level and trends.
Generating personalized training plans tailored to your goals.
Providing coaching responses in chat that are relevant to your history.
Maintaining context across coaching sessions so you don't have to repeat yourself.
Reviewing usage patterns internally to understand how the service is used and to improve coaching quality. This data is never shared externally.

We do not use your data for advertising, sell it to third parties, or use it to train AI models.

Third-party services

Trainar integrates with the following third-party services:

Strava

We use Strava's OAuth 2.0 API to authenticate you and read your activity data. We only request read access — we never write to your Strava account. You can revoke access at any time via your Strava app settings.

Garmin Connect

We use Garmin's OAuth 2.0 PKCE API to authenticate you and receive your activity data via Garmin's Wellness API push model. Garmin sends activity summaries to Trainar when you complete a workout. We only receive activity data — we never write to your Garmin account. You can revoke access at any time via your Garmin Connect account settings.

Anthropic (Claude AI)

Your activity summaries, training preferences, and chat messages are sent to Anthropic's Claude API to generate coaching responses and training plans. This data is processed in accordance with Anthropic's privacy policy. Anthropic does not use API data to train their models.

Stripe

Optional paid features use Stripe for payment processing. Stripe handles all payment data — Trainar never sees or stores your card details. See Stripe's privacy policy.

Microsoft Azure

Our backend infrastructure runs on Microsoft Azure. Data is stored in Azure Blob Storage and processed by Azure Functions within the EU. See Microsoft's privacy statement.

Google Analytics

If you accept our consent banner, we load Google Analytics to understand how the site is used (page views, session duration, general usage patterns). Google Analytics sets cookies on your device and may process data outside the EU. We do not use Google Analytics for advertising or cross-site tracking. See Google's privacy policy.

Your rights

You have full control over your data. From your Profile page you can:

Reset your settings — clears your training preferences, conversation history, training plans, and contextual memory, while keeping your account active.
Delete your account — permanently deletes all data associated with your account from our storage and revokes Trainar's access to your connected provider (Strava or Garmin Connect).

If you'd like to request a copy of your data or have other privacy questions, contact us at privacy@kastrupconcepts.dk.

Data retention

We retain your data for as long as you have an active Trainar account. If you delete your account, all data is removed immediately and cannot be recovered. We do not keep any backups of deleted accounts.

Changes to this policy

If we make material changes to this privacy policy, we'll update the date at the top. Continued use of Trainar after changes constitutes acceptance of the updated policy.