Great! If I had to guess, I'd lean towards 360 Security. In general, 3rd party security apps aren't necessary these days, thanks to
Google Play Protect. You can also follow some of these other guidelines to protect yourself:
1. Avoid shady websites that deal with things like porn, gambling, and "free" (aka pirated) apps/music/movies.
2. Never ever tap on a link that appears in a popup while browsing, especially if they're warning you that your phone is infected -- they're just trying to scare you into installing some bogus "antivirus" app that is probably malicious itself.
3. Only install apps from well-established app sources like Google Play Store or Amazon Appstore. Read a bunch of app reviews before installing an app to look for any complaints about adware or suspected malware.
4. Turn on Google Play Protect features in
Settings>Google>Security. This allows Google to periodically scan your phone's apps to look for malware.
5. Turn off "Unknown Sources" in
Settings>Security. This prevents any app that wasn't obtained from Google Play Store from being installed (which could include malicious apps that are inadvertently downloaded).