I recommend installing the free demo version prior to purchasing and check the need for session management. The OC Session Manager module is generally supposed for OpenCart 3. Opencart stores some user details (language, currency, cart, and many others.) in PHP periods. OpenCart can store this details in two approaches: https://other-is-pulseira-vermelh46665.blog2freedom.com/31826869/considerations-to-know-about-opencart-vs-magento