The free version is supported by pop-up ads and prompts to upgrade.
The "Total" in the name refers to its multi-engine approach. Unlike most antiviruses that rely on a single database, 360 Total Security integrates several engines: 360 Total Security Free Download
You have the option to enable the Bitdefender and Avira engines for a higher detection rate, though these are often disabled by default and can increase RAM usage. The free version is supported by pop-up ads
Includes the 360 Cloud Scan, QVMII AI, and Kunpeng engines. and Kunpeng engines.