Privacy.
We collect as little as we can and keep the calculator entirely on your device.
What we collect
You can browse every page and use the calculator without an account. If you join the newsletter we store the email address you give us, and your first name if you choose to add it, so we can send you the guides you asked for.
Calculator values
Every calculation runs locally in your browser. The amounts you enter are never transmitted to us, never stored on a profile, and never included in analytics events. Only the fact that a calculation was completed is counted, without any of its values.
Analytics
We use aggregate analytics — page views, referrers, and counts of actions such as newsletter signups. We do not use analytics to build individual profiles, and search text and calculator inputs are excluded.
Newsletter delivery and subscriber management are handled by Omnisend on our behalf. Every email includes an unsubscribe link, and unsubscribing removes you from the list.
External links and affiliation
Some links lead to external sites, including Exactide, a research-product store we are affiliated with and from which we may earn a commission. Those sites have their own privacy practices, which we do not control.
Your choices
You can ask us to delete your email address and any newsletter record at any time by contacting us. If you are in a jurisdiction with additional rights, such as access or portability, tell us and we will honour them.
Questions about any of this? Use the contact page and we will answer directly.