Sales terms and privacy

Seller: 中山鉄兵（中山工務店）. Operator: 中山 鉄兵.

Support and refund requests: daimon.sales.jp@gmail.com. Weekdays 10:00–17:00 Japan time, excluding Japanese holidays.

Board Feet Tally: $2.99 USD, one-time. Job Margin — Entered-Cost Remainder: $4.99 USD, one-time. No subscription.

Delivery: a buyer-clean Offline Web ZIP is delivered only to the verified purchase email within 24 hours after settled payment is verified. No public download is used.

Refund: duplicate payment, damaged delivery, material mismatch with the description, or failure to start in a supported current browser after redelivery/support, reported within 7 days after delivery. Change-of-mind after delivery is excluded where legally permitted. Statutory rights are not limited.

Privacy: the tools run locally and do not transmit calculator inputs. Stripe processes checkout data under its own terms. Support email is used only to answer the request and maintain the purchase/delivery record required for support, refunds, and legal obligations.

Address and telephone: disclosed without delay by email or in writing upon a lawful request.