Android Security Testing

Android security testing is the practice of assessing an Android application and its interactions with the Android operating system for vulnerabilities, misconfigurations, and weaknesses that could be exploited. It is the Android-specific instantiation of MAST (Mobile Application Security Testing): the same binary-plus-runtime-plus-API testing approach, applied to Android's particular architecture, permission model, and distribution channels.

Why Android needs its own testing approach

Android's open architecture cuts both ways. Sideloading is possible, third-party app stores are a legitimate distribution channel rather than an edge case, and device fragmentation means a meaningful share of users are still running older OS versions or OEM-customized builds years after a given Android release.
An APK is also considerably more straightforward to unpack and decompile than an iOS IPA, which makes static analysis more accessible, for testers and attackers alike.

None of this makes Android inherently less secure. It changes what a testing program has to account for:

• More distribution paths to monitor,

• More OS/OEM combinations to consider, and

• A binary format that reveals its internals more readily during analysis.

What Android security testing actually checks

Local data storage

SharedPreferences is a common source of risk when developers use it to store sensitive values without encryption.  It's a plain XML file, readable on a rooted device.

Since Android 10 (API level 29), scoped storage restricts an app's default file system access to its own app-specific directory, which testing verifies is actually respected rather than bypassed. The Android Keystore is the correct location for cryptographic keys, backed by hardware where the device supports it.

Permissions

Since Android 6.0 (Marshmallow), permissions are requested at runtime rather than granted wholesale at install, allowing users to deny individual permissions. Testing checks that an app requests only what it functionally needs and degrades gracefully, rather than breaking or silently retrying, when a permission is denied.

Network communication

Certificate validation, and whether an app has explicitly re-enabled cleartext HTTP traffic that recent Android versions block by default for apps targeting current API levels.

Binary and build configuration

Obfuscation (via tools like R8 or ProGuard), whether a release build has left a debuggable flag enabled, and whether the app's signing configuration is sound.

Platform interaction

Intent handling is a distinctly Android attack surface: exported components and implicit intents that another app on the device could intercept or spoof if not scoped correctly.

Why Android findings often look different from iOS findings

Automated and manual Android assessments frequently surface more findings than the same level of effort applied to an equivalent iOS app. That's generally not because Android apps are inherently less secure. It's because Android's more open architecture gives testing tools deeper visibility, APKs are easier to unpack, and more of an app's internals are reachable without jailbreaking a device first.

iOS's more locked-down model doesn't eliminate the same categories of risk. It just makes some of them harder for both attackers and testers to see without more specialized tooling.

Comparing raw count of findings across platforms without accounting for this is a common, avoidable mistake.

Android security testing vs. Google Play Protect

Google Play Protect scans apps for known malware signatures, before and after installation, and catches a meaningful share of clearly malicious apps. It isn't a substitute for dedicated security testing.

Play Protect is built to catch malware patterns, not to verify that a legitimate app's own code

• Handles permissions appropriately,

• Stores data securely, or

• Resists tampering.

An app can pass Play Protect scanning cleanly and still fail a proper security assessment on several of these fronts.

Android security testing vs. MAST and MASTG

Android security testing isn't a separate discipline from MAST; it's MAST scoped to one platform.

The distinction matters organizationally more than technically: a team responsible specifically for Android security needs the Android-specific slice of binary SAST, DAST, and API testing, while an organization shipping both Android and iOS needs the full MAST picture across both.

OWASP's own MASTG reflects this same split. Its test cases, best practices, and knowledge articles are organized separately by platform beneath each MASVS category, because a control like MASVS-STORAGE is verified completely differently on Android (SharedPreferences, the Android Keystore) than on iOS (Keychain Services, the Data Protection API).

For the platform-agnostic concept, see What is MAST?

For the iOS-specific counterpart to this page, see What is iOS Security Testing?

Where Appknox fits

Appknox's Automated Vulnerability Assessment runs

• Android-specific binary SAST (decompiling the APK, checking signing configuration and obfuscation),

• AI-led DAST on real Android devices rather than emulators alone, since emulators don't reliably replicate hardware-backed features like the Android Keystore, and

• API security testing, mapping every finding to the OWASP Mobile Top 10 and MASVS category it falls under.

See the full testing methodology: Appknox Automated Vulnerability Assessment.

Frequently asked questions

What is Android security testing?

Android security testing is the process of assessing an Android app and its interaction with the Android OS for vulnerabilities, misconfigurations, and exploitable weaknesses.

Is Google Play Protect enough to secure an Android app?

No. Google Play Protect detects known malware patterns but doesn't verify that a legitimate app correctly handles permissions, storage, or resistance to tampering. A clean Play Protect scan isn't the same as a security assessment.

What's the difference between Android security testing and MAST?

MAST is the platform-agnostic category that covers binary, runtime, and API testing for mobile apps in general. Android security testing uses the same approach, scoped specifically to Android's architecture and APIs.

Why do Android security assessments often find more issues than iOS assessments?

Android security assessments often find more issues than iOS assessments largely because Android's more open architecture and easier-to-decompile binary format give testing tools deeper visibility, not because Android apps are inherently less secure.

Does testing on an emulator work as well as a real device?

Not fully. Emulators don't reliably replicate hardware-backed security features like the Android Keystore, so dynamic testing on real devices remains necessary for a complete assessment.

Related: What is iOS Security Testing? | What is MAST? | What is MASTG? | Appknox Automated Vulnerability Assessment

By Aadarsh Anand, Security Researcher, Appknox Security Research Team

Appknox is an enterprise mobile application security testing platform. This page was written by Appknox's security research team based on direct experience testing Android applications across financial services, healthcare, and enterprise mobile app portfolios. This page was drafted with AI assistance and reviewed and verified by the Appknox security research team.