Contact
Talk to a person.
Every message goes to Jay Vaidya, who runs the site.
- Billing and cancelling
- Pro members can update payment details, download invoices, or cancel from Account → Manage subscription. Payments are processed by Dodo Payments, the merchant of record.
- Refunds and charges
- Email jayvaidya30@gmail.com from the address on your account with the date and amount of the charge.
- Corrections
- Found an error in a lesson or calculator? Send the page and what looks wrong. See how corrections work on the about page.