The performance optimization tools improve the speed, storage capacity, and privacy of your devices. Avira's performance optimization tools include PC cleaner and speed up software for Windows, optimization software for Mac, and a wide range of optimization features available in the free mobile security apps for Android and iOS. In most cases, hard-to-find junk and temporary files are clogging up many gigabytes of valuable space. As your internal storage fills up with data, you might end up with duplicate or unwanted files. Without maintenance, your devices will boot more slowly, and it will take longer for applications to start.