Privacy policy

The BVD Calculator doesn't ask for, collect or store any personal information on our servers. Every calculation runs in your browser. The site is supported by advertising from Google AdSense, which uses cookies as described below.

Information stored in your browser

The calculator saves a few settings in your browser's local storage so they're still there next time you visit:

• Theme — whether you chose light or dark mode.
• Saved calculations — prescriptions you save with the save button (up to 20).

This information stays on your device and is never sent to us or anyone else. You can remove saved calculations with the Clear button, or remove everything by clearing this site's data in your browser settings.

Advertising

Adverts on this site are provided by Google AdSense. Google and its partners use cookies and similar technologies to serve ads, to measure how they perform, and — where you allow it — to show ads based on your previous visits to this and other websites. We don't see or receive this information.

If you're in the European Economic Area, the UK or Switzerland, you'll be asked for your consent before personalised ads are shown, and you can change your choice at any time using the privacy settings link shown by the consent message. If you don't consent, you may still see non-personalised ads, which use cookies only for purposes such as frequency capping and fraud prevention.

You can find out more, or control personalised advertising, here:

• How Google uses information from sites that use its services
• How Google uses cookies in advertising
• Google My Ad Center — turn personalised ads from Google on or off
• aboutads.info and Your Online Choices — opt out of personalised ads from other participating ad networks

Changes to this policy

If this policy changes, the updated version will be posted on this page with a new "last updated" date.