Avast provides multi-device security where you can easily secure your various devices with a license with an Avast activation code. The main advantage of using Avast security for multiple devices is that it runs on different OSes. You can secure your Windows PC, MacBook, Android phone or iOS. If we calculate the costs, then using an antivirus for multiple devices is cheaper than buying individual antivirus programs. If you have purchased an antivirus for multiple devices; you need to download and install Avast on one device and then you can easily activate your subscription avast license.