Which app types require SAP HANA as system database?

SAP HANA as a system database is essential for certain types of SAP Fiori applications due to their reliance on real-time data processing and analytics capabilities. Analytical apps (A) leverage the SAP HANA database to provide real-time insights by directly accessing operational data. Fact sheet apps (C) also require SAP HANA as they enable users to drill down into the details of a business operation directly from their Fiori Launchpad, pulling data in real-time from the HANA database. Classic applications (B) and transactional apps (D), on the other hand, do not inherently require SAP HANA as the system database, as they can function on any database that supports the underlying business logic and data persistence requirements.