Avast Premium Security vs iolo System Shield
| Avast Premium Security | iolo System Shield | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | $6.50/mo | — |
| Open source | No | No |
| Platforms | Android, iOS, macOS, Windows | Windows |
| Free plan | No | No |
| Paid from | $77.99/yr | — |
| Protection scope | internet security | antivirus |
| Device limit | 10 devices | — |
| Supported platforms | Windows, macOS, Android, iOS | Windows |
| Ransomware protection | Yes | — |
Both are listed in Best Antivirus Software. On Everything Xiaomi, Avast Premium Security scores higher on our published basis.