One-time products

Buy the reusable system only when the free answer is not enough.

No subscription. These products are deeper offline workbooks and production systems connected to the free tools on this site.

Vehicle Ownership Cost Workbook

Purchase, recurring costs, fuel, maintenance, resale and scenario comparisons.

Regular, overtime, night, weekend and other premium hours with editable pay rules.

Appliance usage, tariff, monthly/annual cost and reduced-use scenarios.

$12

Pricing, sponsorship deals, revenue planning, orders, inventory and privacy operations.

The existing larger game-development catalog remains available separately because it already has live itch.io purchase paths.