SuperMemo 18 Upgrade

SuperMemo helps you forget about forgetting. 

Documentation: https://help.supermemo.org/
Support: https://supermemopedia.com/
Science: https://supermemo.guru/

Who qualifies for the upgrade:
* customers who bought any products from SuperMemo Store before May 1, 2023 (old SuperMemos, collection, etc.)
* customers who bought any shrink-wrapped SuperMemo

When ordering specify your previous order number, or registration number, or any identifiable detail(s) of your prior purchase.