Last updated: May 26, 2026
Shevalion was built with a simple privacy principle: your data lives on your device.
How we collect, use and share health data — and how to see it, delete it or withdraw your consent — is set out in our separate Consumer Health Data Privacy Policy. We ask before we keep any health data on your device, and separately before any of it is sent to the AI service; you can change either answer in Settings → Privacy.
The following stays in your browser's local storage, not on our servers. When you use the AI coach, a summary of it is sent with your message (see below):
Clearing your browser data, uninstalling the PWA, or using "Delete all my data" in Settings → Privacy will permanently delete this information.
If you enter your email address to receive your plan, we store that address together with the app you use, your goal, your program name, your sex if you entered it yourself, whether you agreed to receive tips and offers, and the date. We use it to send you your plan and — only if you ticked the box — occasional tips and offers, each with an unsubscribe link. The email is sent through our email provider (Resend). We keep it until you unsubscribe or ask us to delete it. Ask us at rockpros@gmail.com and we will delete it.
When you chat with Shevalion, your messages and — only if you allowed health-data sharing in Settings → Privacy — your context (profile, current cycle phase, recent bloodwork, nutrition logs) travel to Anthropic or OpenAI to generate a response. Under their commercial API terms, conversations are not used to train models.
Your menstrual cycle data is treated with the same on-device-only principle as everything else. We never send it to any server we control. It is only included in the AI conversation context — and only if you allowed health-data sharing in Settings → Privacy — for the duration of that conversation.
The "Scan" feature sends the image to our AI vision provider to extract values. The image is not stored by us.
No third-party tracking. No analytics. No advertising networks. No data brokerage.
Some links in the app to other companies — for example the recommended gear and supplements on Amazon and meal delivery companies — may be affiliate links or come with a promo code, and we may earn a commission if you buy through them. Opening one is an ordinary visit to that company's site: no personal or health data from the app is sent with it.
Stripe processes subscriptions. We retain only subscription status and a billing email. No card data is stored by us.
Shevalion is for adults age 18 and older.
Privacy questions: privacy@shevalion.com