We are writing a security standard for mobile apps and a comprehensive testing guide that covers the processes, techniques, and tools used during a mobile app security test, as well as an exhaustive set of test cases that enables testers to deliver consistent and complete results. The MSTG is a comprehensive manual for mobile app security testing and reverse engineering for iOS and Android mobile security testers. The OWASP Mobile Application Security Verification Standard (MASVS) is, as the name implies, a standard for mobile app security. It can be used by mobile software architects and developers seeking to develop secure mobile applications, as well as security testers to ensure completeness and consistency of test results. A checklist is available for use in security assessments that is based on the MASVS and MSTG and contains links to the MSTG test case for each requirement.