Is MacKeeper a reliable software to use?

MacKeeper is a utility software suite for Mac OS X that includes antivirus, data encryption, data recovery, and system cleanup tools. It has had a controversial reputation due to aggressive advertising campaigns and accusations from users and reviewers that it uses scare tactics to encourage purchases, as well as reports of performance issues on Mac computers after installation. While some users may find certain features of MacKeeper beneficial, the software has generally been criticized by experts within the cybersecurity community. It's always important to research and consider reviews from trusted sources before installing any software and to explore alternatives that have established credibility and positive user feedback in the industry.