CCleaner is one of the most popular windows disk and registry cleaning utility. It scans the system for unwanted file and folders and removes it with a single click. Developed by Piriform
License: Freemium
CCleaner is primarily focused on comprehensive disk and registry cleaning for desktop systems, while Clean Master offers a broader range of features including real-time monitoring and mobile optimization. Users looking for a powerful desktop cleaning tool may prefer CCleaner, whereas those needing mobile optimization and performance boosting may find Clean Master more suitable.