I was having problems with Malwarebytes on Android (kept freezing, even after uninstalling and reinstalling) so I am looking for a new one. The only name I recognized from the Google Play store that did not say that they would feed me ads (or in-app purchases) was Sophos. I am ok with this, but after installing, it keeps telling me that it needs to be the phone adminstrator to prevent being uninstalled. Is this normal for a security app? I don't recall Malwarebytes continually nagging me for this. I'd like to be able to easily uninstall this app if I ever want to, so I'm not sure why I'd want to make it a phone administrator. Anyways, if this is not a reasonable demand from Sophos, are there any other free antimalware apps that don't have ads or nag me to buy stuff?