Privacy

Body weight is health data. Here is what we do with it.

The free calculator stores nothing

The two numbers you type into the calculator are computed in your browser. They are not sent to us and not saved. If you copy a share link, the numbers travel in that link and nowhere else.

What the app stores when you have an account

Your email address and a hashed password.
Your settings: units, wake time, cutoff mode, target rate.
Your daily entries: a max weight, a min weight, the time of your last meal, and any flags you set (different scale, unwell, cycle marker).
Your answers to the signup screening questions, including whether you were asked to consult a doctor before continuing, and your acknowledgement of the medical disclaimer.
A Stripe customer and subscription reference. We never see or store your card number.

What we do with it

Compute your delta, your trend line, and tomorrow’s target. That’s it. We do not sell it, share it with advertisers, or use it to train anything. Aggregate, de-identified counts (for example, what share of accounts complete the 14-day baseline) may be used to improve the product.

Your rights

Export your complete entry history at any time from settings, as CSV.
Delete your account and all entries at any time from settings. Deletion is immediate and permanent. Stripe retains transaction records as required by law.
Access and correction: every entry is editable by you.

If you are in the EU, UK, or California, the rights above are how we meet GDPR and CCPA requests. For anything else, email jeremy@thebodyarcade.com.

Cookies and analytics

The marketing site uses privacy-respecting analytics without cross-site tracking. The app sets only the cookies it needs to keep you signed in.

Processors

Hosting: Hostinger. Payments: Stripe. Email: transactional only, tied to the protocol (welcome, day 14, and so on), no broadcast list unless you opt in.

Draft pending legal review. Last updated 16 September 2026.