At NowSecure we spend a lot of time attacking mobile apps - hacking, breaking encryption, finding flaws, penetration testing, and looking for sensitive data stored insecurely. We do it for the right reasons - to help developers make their apps more secure. The best way to verify that your app follows secure mobile development best practices is to perform security assessments of the app, which can include automated mobile app security testing, fuzzing, manual penetration testing, and more.