It would be nice to have that slow scan fire off only in the middle of the night when it doesn't matter to you. Unfortunately, as with most Android antivirus apps, you can't schedule a scan. It also performed poorly on the full-scan system-impact test.
Lookout Security & Antivirus had by far the longest full scan, at approximately 2 minutes and 20 seconds, of any of the eight Android antivirus apps I tested in early 2019 on a Google Pixel 3 phone.
