Privacy Policy

Enduranz lab is the data controller for this site. You can reach us at contact@enduranz-lab.app or via the Support page.

If you create an account, we store your email, password hash, and any race plans or profile details you choose to save, so you can access them across devices.

Without an account, your race settings and pace calculations stay only in your browser.

Help Center feedback: when you answer “Was this page helpful?”, we store your answer and any comment you add. This feedback is anonymous: it isn’t linked to your account and we don’t store your IP address. Please don’t include personal information in comments.

If you contact Support, we store the email address and message you send us, and any replies, to answer your request. Support conversations are deleted with your account. Server logs may briefly record technical data (such as IP address) for security and abuse prevention.

We use a session cookie to keep you signed in, and a small cookie to remember your preferred language. We do not use advertising cookies, and we do not run third-party ad trackers.

To understand which pages are used most, we use Umami, a privacy-friendly, self-hosted analytics tool. Umami does not use cookies and does not track you across other websites. This data stays on servers we control and is never shared with advertisers or third parties.

We also record which days you use Enduranz (on the web or through an AI assistant) to count active users. This is kept until you delete your account or it is deleted for inactivity, and is included in your data download.

When something breaks, we send a technical error report to Sentry (Functional Software, Inc.), an error-monitoring service that stores reports in the European Union, so we can fix it. The report describes the error, the page or feature where it happened, your browser and device type, and the app version. It never contains your name, email, account ID, IP address, or any of your training, race or health data.

You can connect an AI assistant to your account through MCP. You choose whether to connect one and whether to approve the access it asks for. When it uses that access, the data it reads or writes passes through the assistant and its provider, under that provider’s own terms and privacy policy. We don’t control what they do with it. You can remove access at any time in Settings › AI and MCP. This stops future access; for data the provider has already received, contact that provider.

We keep a record of each connection (its name, the access approved, when it was created, last used and removed, and technical details of its access tokens), even after you remove it, until your account is deleted. Its name, access and dates are included in your data download.

If you don't use your account for 36 months, we deactivate it. Using means signing in, opening the app, doing something in it, or using it through an AI assistant. An active subscription keeps your account open while it runs. We email you 6 months and 3 months before, and on the day.

A deactivated account keeps all its data, and signing in restores everything. From 12 months after deactivation, we permanently delete the account and its data. We review and do this by hand, so it can happen some time after that date, and we email you a month before. Deactivation can also happen some months after the 36, for example after a recent sign of use, but never sooner.

Backups containing your data age out within our normal backup cycle, 14 days by default. Billing records, including your email address, stay with our payment provider Stripe as the law requires.

Depending on where you live, you may have rights to access, correct, or delete your personal data. From Manage my account you can request a copy of your personal data — we email a download link and a code — or delete your account and its data at any time. Page-view analytics (Umami) and server logs are not included in that download.

For any other request, contact Support and we will help.

We may update this page as the product evolves. Meaningful changes will be reflected here, with a new date at the bottom of the page.