Mobile App Security Checklist 2026: Key Practices for React Native and Expo Apps

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A practical security guide for React Native and Expo developers outlines critical steps to prevent common mobile breaches in 2026. Key recommendations include storing tokens exclusively in the OS keychain via expo-secure-store rather than plaintext AsyncStorage, and implementing certificate pinning using SPKI hashes with backup pins. The guide emphasizes integrating automated security tools such as Semgrep, eslint-plugin-security, npm audit, and MobSF into CI pipelines on every release. Developers are also warned to treat AI-generated code as untrusted input, reviewing it with the same scrutiny applied to external contributors. The checklist is structured around the OWASP Mobile Top 10 (2024) and addresses rising mobile attack rates and increasing regulatory oversight.

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