Hi there! Thanks for stopping by!
Try this:
https://www.malwarebytes.org/mobile/
You can also avoid issues by downloading only from the Play Store, and only apps from there, that have many reviews/downloads. Never, unless you know 100% for sure, do you download any apk/app from any site outside of the Play store, unless you've check here, to make sure its trustworthy.
Hope this helps!