Terms of use
Seller and service
ProofAnvil is operated by Martin Alberto Piceno Jr in San Diego, California, USA. ProofAnvil is a practice tool for mathematics, physics, and engineering; it is not a substitute for instruction, professional advice, or an academic institution's policies.
Membership
ProofAnvil Intensive is $39 USD billed monthly, with no trial. It includes 100 monthly AI grading cycles, up to 5 follow-up Coach questions after each grade when Coach is available, and 3 Advanced Reviews per month. Each AI grade request consumes one grading cycle, including revision grades of the same solution. Follow-up Coach questions and Advanced Reviews do not use a grading cycle. Monthly paid allowances reset without rollover. Free accounts receive a one-time sample of 4 AI grading cycles that does not refill monthly. Optional top-ups add 25 grading cycles for $12 USD. Charges, renewal timing, and payment method are shown in Paddle checkout before purchase.
Using ProofAnvil
Use ProofAnvil lawfully and do not interfere with the service, attempt to access another person's account, or submit material you do not have permission to share. You remain responsible for the work and information you submit.
Changes and availability
We may change or pause parts of the service. Material changes to these terms will be posted here. These terms do not limit rights that cannot be limited under applicable law.