Privacy & analytics
Updated September 27, 2026
The free calculator
Your unsaved arrangement is held in your browser. Drafts can be temporarily kept in browser session storage when you move through signup. PDF and CSV worksheets are generated in your browser.
Your saved studio
When you create an account, Google’s authentication service handles your email and password. Stemwork uses a secure session cookie to keep you signed in. Recipes and events you choose to save are stored in Google Cloud and associated with your account.
Subscriptions and payments
Stripe handles card setup for the Studio trial, checkout, payment details, invoices, and billing management. Stemwork stores your trial dates, Stripe customer and subscription identifiers, and subscription status to manage Studio access. Card numbers do not pass through our app server.
Account emails
Stemwork uses Resend to deliver account welcome messages, trial confirmations, and billing reminders. These messages use your account email and relevant signup or trial dates. The site owner receives a notification with your email and signup time when you create an account. Email delivery records are stored in Google Cloud to prevent duplicate messages and retry delivery failures. These are service emails, not a marketing mailing list.
Support requests
When you contact support, Stemwork stores your message, category, subject, optional page path, account identifier, and account email in Google Cloud. Resend delivers the report to the site owner, with your account email as the reply address. URL query parameters and fragments are removed from the optional page link. Please do not include passwords, payment details, or your clients’ personal information.
Optional usage analytics
With your permission, Google Analytics measures page visits and actions such as using the calculator, downloading a worksheet, creating an account, and saving a recipe. Our analytics events exclude email addresses, client names, recipe notes, supplier details, and prices. Google processes usage and device information through its analytics service.
You can choose Necessary only or change your choice using Cookie settings on any page. Declining analytics does not affect the calculator or studio. We also respect browser Do Not Track and Global Privacy Control signals.
Read how Google uses information from sites that use its services.