Privacy policy
Last updated 22 September 2026
The important part first: your numbers stay on your own device.
The short version
Without an account, your business figures never leave your browser. Every calculation runs on your own device. Your average order value, margins, costs, ad spend and results are not uploaded or stored on any server. If you choose to sign in, your saved businesses are stored in your account so they follow you to other devices; that is the only time they leave your browser.
What stays on your device
The tool saves your inputs in your browser’s local storage so your numbers are still there when you come back. That data sits on your computer or phone, under your control. Clearing your browser data deletes it, and nothing is sent to us in the process. Your licence key, if you have one, is stored the same way.
If you sign in
Signing in is optional. We use your email address to send you a sign-in link and to identify your account. While you are signed in, the businesses you save (names, figures, months and scenarios) are stored in our database so they are there on any device, and your plan is recorded against your account. Deleting a business deletes it from the database. Ask us and we will delete your account and everything in it.
What we do collect
- Analytics. We use Google Analytics and Cloudflare Web Analytics to count page views and see which pages are used and where visitors come from. This records things like the page visited, approximate country, and the type of device. It does not record what you type into the calculator.
- Server logs. Our host, Cloudflare, records standard request information such as IP address and browser type, for security and to serve the site. This is normal for any website.
- Email, if you write to us. If you contact us we keep the message and your address so we can reply.
Payments
Purchases are processed by Paddle.com, our reseller, acting as merchant of record. They collect the information needed to take payment and meet tax obligations, including your name, email, country and card details. We never receive or store your payment details. Their privacy policy governs that data.
Third parties we rely on
- Cloudflare — hosting and delivery of the site
- Paddle — payments, invoicing and tax
- Supabase — accounts and the businesses you save while signed in
- Resend — sending sign-in emails
- Google Analytics — visitor statistics
- Cloudflare Turnstile — checking the sign-in form is used by a person, not a bot
- Tailwind CSS and jsDelivr — page styling and the sign-in library
- cdnjs — the PDF library, loaded only when you generate a report
Loading a font or a script means your browser requests a file from those providers, which necessarily reveals your IP address to them. None of them receive your calculator inputs, except Supabase, which stores the businesses you save while signed in.
Cookies
The tool itself sets no cookies. Local storage is used instead, and it is not shared with us or anyone else. Google Analytics sets cookies to tell visits apart; where consent is required by law, it will be requested.
Your rights
Depending on where you live, you may have the right to ask what personal data we hold about you, to have it corrected, or to have it deleted. Because we hold almost nothing — your calculator data is not ours to hold — such requests are usually simple. Write to [email protected].
For purchase records, contact Paddle at paddle.net, who hold that data as merchant of record.
Children
This is a business tool and is not intended for anyone under 18.
Changes
If this policy changes, the date at the top will change with it.