Dear Rich: What do I do about people who are beta testing my mobile app. Do we need to have them sign NDAs? If you're trying to maintain secrecy about the software and you want to place some limitations on copying and other activities, you should use a beta tester nondisclosure agreement (NDA). We have one posted here. (Click on the links for explanations regarding each provision.) You may find that some of the language is overkill, for example, the security provisions in Section 4. Modify to match your needs.