We collect as little as we can and we don’t sell your data. Here’s exactly what happens to your information when you use School of Mahjong.
What we collect
Payment information: when you buy the course, Stripe collects and processes your payment. We receive a record that you’re a paying customer and the email you used, but we never see or store your full card number.
Access cookie: once you’re Pro, we store a small signed cookie on your device so the Service knows to unlock your lessons. It isn’t used to track you across other websites.
Learning progress: your lesson progress, drill streaks, and similar practice data are stored locally in your own browser (localStorage). They stay on your device and aren’t sent to us.
Site analytics: we measure how the site is used so we can improve it. This includes a first-party cookie (a random id, no name attached) that records which steps you take on a page, for example, on a free-read landing page, whether you opened a read, scrolled to the sign-up box, or submitted it, so we can see where the experience can be better. This stays in our own systems.
Advertising measurement: on pages we run ads to, we use Google Analytics and the Meta (Facebook/Instagram) pixel to measure whether an ad led to a sign-up or purchase. These set their own cookies and can be used by those companies for cross-site advertising. If you arrived from an ad, your email is hashed (not sent in the clear) when we report a conversion. You can opt out via your browser/ad settings; the site works the same either way.
How we use it
We use this information to provide the Service: to unlock Pro lessons for paying members, process payments and refunds, answer your emails, and improve the lessons based on what’s being used.
We don’t sell your personal information, and we don’t share it except with the service providers below who help us run the site.
Who we share it with
Stripe processes payments (see Stripe’s privacy policy). Vercel hosts the site. Google Analytics and Meta (the Facebook/Instagram pixel) provide advertising measurement on pages we advertise to. We keep the number of third parties small on purpose, and we don’t sell your data.
Your choices
You can clear your browser’s localStorage to erase your saved progress, and clear cookies to remove your access cookie. To see what data we hold about your membership, or to ask us to delete it, just email us.
The Service isn’t directed to children under 13, and we don’t knowingly collect their information.
Contact
For any privacy question or request, email support@schoolofmahjong.com. We’ll respond promptly.