What's a good Android app for cleaning up junk files and optimizing phone performance?

Ultra Clean is a system optimization tool for Android devices. It helps users reclaim storage space by identifying and removing junk files, cache, and obsolete APKs. The app also includes a memory boosting feature that closes background processes to free up RAM, potentially improving device responsiveness. While its 3.8 rating suggests a mixed user experience, many users find it effective for basic cleaning tasks. It also offers CPU cooling and battery saving features, which can help extend battery life and prevent overheating. Keep in mind that the effectiveness of such apps can vary depending on the device and usage patterns. Before using Ultra Clean, review its privacy policy and ensure it aligns with your data protection preferences. Regular use can help maintain a cleaner and faster Android experience, but it's essential to use it responsibly and be aware of the permissions it requests.