Unfortunately, there are scams involving websites and apps that promise to provide freebies, so don't blindly download any app that claims to provide freebies without first conducting extensive research on them. In most situations, reputable apps that offer free samples only require your name and mailing address.  Websites may also require your email address to contact you further. Never provide your Social Security number or credit card information in exchange for a free sample or gift card. The apps listed above are all legitimate and safe.