Are free computer maintenance tools much worse than those, but not free-of-charge? Is it enough to have just one similar tool on the computer, like CCleaner? I don't want to pay if the result is the same.
You should be okay with CCleaner because its updated version is performing intelligent scans without affecting your system stability. CCEnhancer is a good add-on that improves the effectiveness of the scanning jobs by removing files from the third party applications installed in your computer.