Webroot is the name of a widely acclaimed range of anti malware & anti spyware computer software products.
They have a free app for android mobiles, and I think it a must to have. It is called "Webroot Security". Just a search for "Webroot" should find it.
When you launch this app. it first updates itself with the latest malware definitions it needs to check that there is no Trojan malware hidden in your apps that could spread infection within your device, or that you could pass on.
It does this very quickly, so ...perhaps a few seconds.
Then there is another part of it that can remotely clear your phone of data if it is stolen.
It can also remotely lock the phone from being used by the thief.
And it can be made to make the phone "scream", if you misplaced it.
Now, as this app is made by a commercial company of high regard in the computer security industry, not by someone in their bedroom, it can be recommended.
It is good to see some big companies making apps for use at no cost.