Security Engineering / Mobile App Security
Mobile App Security
Mobile apps ship your code to every user's phone, where it can be decompiled, tampered with, and inspected. We test Android and iOS apps against the OWASP MASVS, covering local storage, network traffic, authentication, and the APIs behind them, and help you fix what we find.
What Is Mobile App Security Testing?
Mobile app security testing checks an Android or iOS app, and the backend it talks to, for weaknesses an attacker could use. It covers data stored on the device, network communication, authentication, use of platform features, code quality, and resistance to reverse engineering. The industry baseline is the OWASP Mobile Application Security Verification Standard (MASVS), with test methods from the OWASP Mobile Application Security Testing Guide (MASTG).
This Is For You If...
Your app handles payments, health data, or personal information
API keys or secrets are compiled into your app
A bank, enterprise customer, or app store review raised security questions
You built the app with React Native, Flutter, or an AI builder and want an outside check
You've never tested what your app stores on the device
OWASP MASVS Categories We Test
Category | What We Check |
MASVS-STORAGE | Tokens, personal data, and cache stored insecurely on the device |
MASVS-CRYPTO | Weak or misused encryption and hardcoded keys |
MASVS-AUTH | Login, session handling, biometrics, and server-side authorization |
MASVS-NETWORK | TLS, certificate pinning, and data sent in clear text |
MASVS-PLATFORM | Deep links, WebViews, intents, and permissions |
MASVS-CODE | Outdated libraries, debug code, and unsafe input handling |
MASVS-RESILIENCE | Reverse engineering, tampering, rooting, and jailbreak detection |
MASVS-PRIVACY | Data collection, tracking, and handling of personal data |
What We Test
Android Apps
APK and AAB analysis, decompilation, exported components, storage, and runtime testing on rooted devices.
iOS Apps
IPA analysis, Keychain use, App Transport Security, URL schemes, and runtime testing.
Cross-Platform Apps
React Native, Flutter, and Ionic bundles, where secrets and logic are often easy to extract.
The API Behind the App
Most mobile breaches happen through the backend API. See API Security.
Secrets in the App
Hardcoded keys, tokens, and endpoints extracted from the app binary. See Secrets Management.
Common Mistakes to Avoid
Instinct | Why It Doesn't Help | Do This Instead |
Hiding API keys in the app | Apps can be decompiled in minutes | Keep secrets on the server and use short-lived tokens |
Trusting checks done in the app | Attackers can modify the app or skip it | Enforce every rule on the server |
Storing tokens in plain preferences | Other apps or a lost phone can expose them | Use Keychain on iOS and Keystore on Android |
Testing only the app, not the API | The API is where the data lives | Test the app and its backend together |
What You Get
Findings mapped to OWASP MASVS categories
Proof and risk rating for each finding
Fix guidance for native, React Native, or Flutter code
API findings from the backend behind the app
A retest of fixed issues
A shareable summary for customers and app reviews
How It Works
1. Scope
App builds, platforms, test accounts, and API endpoints agreed
2. Static analysis
Decompile and review the app package
3. Dynamic testing
Run the app on test devices and intercept traffic
4. API testing
Test the backend the app relies on
5. Report and retest
Findings, fixes, and confirmation
Why Codersarts
We build mobile apps as well as test them, so fixes come with working code for your framework. See Mobile App Development.
Turnaround Time
Testing one app on one platform takes 5 to 8 working days. Android and iOS together, with the backend API, usually takes 2 to 3 weeks.
FAQ
What is OWASP MASVS?
The Mobile Application Security Verification Standard is OWASP's security standard for mobile apps, organized into eight categories from storage to privacy.
Do you need our source code?
Not necessarily. We can test the release build. Source code access makes testing faster and fixes more precise.
Can you test apps built with Flutter or React Native?
Yes. Cross-platform apps have their own risks, such as JavaScript bundles or Dart code that expose logic and secrets.
Is root or jailbreak detection enough?
No. It slows attackers down but can be bypassed. Security must be enforced on the server.
Is our project kept confidential?
Yes. Your data, code, and results stay confidential, and an NDA is available on request.
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What Can Someone Pull Out of Your App?
Find out before it reaches a forum or a competitor.