Terms
Terms of service
Last updated 2026.
One-time purchase
Calcu is sold as a single, lifetime purchase per license. There is no subscription and no recurring charge.
License scope
A purchased license entitles the buyer to install and use Calcu on their own devices, subject to the device-activation limits described at checkout.
Content
The curriculum, exercises, and reference material in Calcu are provided for personal learning use and may not be redistributed or resold.
Changes
We may update these terms as the product evolves. Material changes will be reflected here with an updated date.