Security Books The Mobile Application Hacker's Handbook https://www.amazon.com/Mobile-Application-Hackers-Handbook/dp/1118958500 OWASP Mobile Security Testing Guide https://owasp.org/www-project-mobile-security-testing-guide/ Mobile App Security Requirements and Verification https://owasp.org/www-project-mobile-security-testing-guide/ Test apps, sandboxes iOS - DVIA (Damn Vulnerable iOS App) http://damnvulnerableiosapp.com/ Android - DIVA (Damn insecure and vulnerable App) https://github.com/payatu/diva-android