Scarlet Antirevoke is a popular tool for installing IPA files on iOS devices without jailbreaking them. The SCA Free version offers a free and easy-to-use solution for users who want to install IPA files. While SCA Free has limitations, it is a good option for users who want to test IPA files or install apps that are not available on the App Store. However, users should be aware of the potential risks associated with installing IPA files from third-party sources.