Mobile App Launch Security Checklist

TL;DR

Mobile apps face unique security challenges. Before launch, secure your backend API, avoid storing secrets in the app binary, use secure storage for sensitive data, enable certificate pinning for critical apps, and verify your app meets store security requirements.

API and Backend 4

API authentication on all endpointsEvery protected endpoint should verify the user token

API validates all inputsNever trust data from the app. Validate on the server.

Rate limiting enabledProtect against abuse from compromised or malicious apps

API uses HTTPS onlyAll communication between app and backend must be encrypted

Data Storage 4

No secrets in app binaryAPI keys can be extracted from apps. Use backend for sensitive operations.

Use secure storage for sensitive dataKeychain (iOS), EncryptedSharedPreferences (Android), or SecureStore (RN)

Don't store sensitive data in logsLogs can be accessed by other apps or attackers

Clear sensitive data on logoutTokens, cached data, and user info should be removed

Authentication 4

Secure token storageAuth tokens in secure storage, not AsyncStorage or UserDefaults

Session expiration worksExpired tokens should require re-login

Biometric auth (if using)Use platform APIs correctly. Don't roll your own.

Deep links validatedVerify deep link parameters before acting on them

App Store and Distribution 4

Privacy policy in placeRequired by app stores. Describe data you collect.

Permissions are justifiedOnly request permissions you need. Explain why to users.

Test on real devicesSecurity features may behave differently than on simulators

Remove debug codeDebug flags, test accounts, verbose logging should be removed

Can I store API keys in my mobile app?

You should avoid it. API keys in app binaries can be extracted. Instead, have users authenticate, and let your backend make API calls on their behalf.

Should I use certificate pinning?

For apps handling sensitive data (banking, health, payments), yes. For general apps, it adds complexity and can cause issues when certificates rotate. Consider your threat model.

Scan Your Mobile Backend

Find API security issues before launch.