Privacy
Last updated: 21 October 2026
International Maths Project (improject.org) is run by David Lamb. This page explains what we collect so the site can run, how ads work on the Free tier, and how to reach us.
Accounts
If you create an account we store your email, display name, role (student / teacher), and optional year group / age band so we can tailor practice. Authentication is handled by Supabase. We do not sell personal data.
Payments
Card payments go through Stripe. PayMe and AlipayHK are offered as local options in Hong Kong. We do not store full card numbers on our servers.
Advertising (Free tier)
On Free pages we may show Google AdSense ads. Google and its partners use cookies or similar tech to serve and measure ads. Plus / Pro / Ad-free subscriptions hide these ads. You can learn more in Google’s advertising policies. Publisher id: ca-pub-1975626820097009.
Affiliate links
Some product links may include affiliate tags. See Affiliate disclosure.
Contact
Privacy or sponsorship questions: use the contact form on Sponsors & partners. We reply by email; our address is not published on the site.