Well as notice I rate this app 0 stars.stopped working were I work & shop No one can explain what's wrong with it. And I used the contact email on here for this app. Joke no response, Used chat on app. It's self.Was given customer service then they gave me a bogus number for tech No Help😡 I have used many apps to scan. Always just to uninstall. So i tried this one. Its a keeper so far. Was surprised how fast it works. 5 stars plus. I rarely rate apps that high on here. Thanks for this app.