This case study outlines the challenges and solutions associated with securing mobile healthcare applications and their APIs. The rapid adoption of mobile healthcare apps has heightened the need for robust security measures to protect personal health information (PHI) and ensure compliance with regulations such as HIPAA. Traditional security approaches, including signature-based solutions and anti-tampering measures, are insufficient for the unique demands of mobile environments. The case study presents Approov Mobile Security as a comprehensive solution that offers multi-factor authentication, protection from man-in-the-middle attacks, and dynamic management of security policies and secrets. Key features include the elimination of API keys from mobile code, live analytics for monitoring security compliance, and easy integration with existing systems. The document emphasizes the importance of maintaining a secure client environment and ensuring that only legitimate apps access sensitive APIs, thereby safeguarding PHI from cyber threats.