Avast Software offers a number of security products for Windows and Mac OS X users that help protect computers against viruses, malware, and other types of security threats. Avast can be removed or uninstalled from your computer using traditional methods in Windows and Mac OS X, or by using avastclear, which is an uninstallation utility offered by Avast.
Removing Avast from iOS
1. Launch the Avast program you want to be removed from your computer.
2. Click on “Avast” and select Uninstall Avast.