Want to make a point clear here -- never put anything on your resume that you aren't prepared to answer questions about. That means if you're lying about freelance (whether the above commenter means to imply you should), then you should be ready to answer questions about your freelance lie.
Same goes for any projects. For CS, if you have a pet project you wrote 12 years ago, but it's interesting enough to note on a resume, glance over it enough to know what it's about. You might be surprised by your interviewer installing your app on their phone or something.