Avast Ultimate is a bundle of products that includes Avast Premium Security, Avast SecureLine VPN, Avast Cleanup Premium, and Avast AntiTrack. It offers antivirus, VPN, anti-tracking, and performance optimization features for your devices. It helps you protect your devices from malware, ransomware, spyware, hackers, and online trackers. It also helps you browse safely and privately, access blocked content, and speed up your PC. Avast Ultimate is available for Windows and Mac devices. You can try it free for 30 days