Is there a way to check the most used application?

Zyxel_Judy

Yes, to check the most used application for both wired and wireless clients, your site needs to have ATP/USG FLEX and a GSP license.

To view usage:

Navigate to Applications Usage > Application View by Security Appliance.

You'll see a list of all applications along with their usage.

For example, you might find that Window updates and Google are the most used applications.