Mobile application penetration testing shows whether an attacker can exploit weaknesses in your Android or iOS app.
It tests the app package, device storage, operating system controls and network traffic, as well as the APIs and backend services you include in scope.
If your app handles customer data, payments or privileged actions, the test gives your developers a prioritised fix list and gives your business dated security evidence.
This guide explains what the test covers, how it runs and when you should arrange one.
What Is Mobile Application Penetration Testing?
Mobile application penetration testing is an authorised attempt to find and safely exploit weaknesses in a mobile app.
It applies the principles of a broader penetration test to the four connected parts of your mobile service.
To see what that scope means in practice, follow the app and its data across these four layers:
- Mobile client: Compiled code, configuration, embedded libraries and hardcoded data.
- Device and operating system: Local storage, permissions, biometrics, deep links and platform interactions.
- Network communication: Encryption, certificate validation, session tokens, requests and responses.
- APIs and backend services: Server-side authentication, authorisation, data access and business logic, when expressly included.
Mobile application security testing and mobile app security testing can also describe automated penetration testing and other automated checks that run throughout development.
A penetration test is the adversarial assessment within that wider program: a tester combines tools, judgement and controlled exploitation to show what a real weakness allows.
Because every engagement has boundaries, the report should state them plainly. If the backend or APIs are excluded, you do not have end-to-end assurance. The same applies to the infrastructure your app connects to, which is assessed through network penetration testing rather than a mobile app test.
What Vulnerabilities Does Mobile Application Penetration Testing Find?
Mobile application penetration testing finds weaknesses that expose data, bypass access controls, abuse platform features or let someone alter how your app behaves.
For reference, the OWASP Mobile Application Security Verification Standard (MASVS) groups this attack surface into consistent testing areas.
That framework becomes useful when you connect each security area to the weakness it can reveal:
- Storage and privacy: The tester reviews files, databases, logs, backups, screenshots, clipboard use and analytics. You can reveal personal data or tokens left exposed on the device. These are the same leakage paths data loss prevention controls are meant to close.
- Authentication and authorisation: The test covers login, password reset, biometrics, sessions and user roles. Also, it may show that a logged-out token still works or one user can reach another user’s data. Reused or weak credentials sit behind many of these findings, so password management practice affects how much the app’s own controls can protect.
- Cryptography: The tester checks how the app generates, uses and stores keys. This can reveal hardcoded keys or sensitive material stored outside protected platform storage.
- Network security: The test reviews TLS, certificate validation and data sent to remote services. It can expose cleartext traffic or unsafe certificate handling.
- Platform interaction: The tester checks permissions, exported components, deep links, URL schemes and WebViews. A weakness here may let another app or crafted link trigger a restricted function. Where a WebView loads your own web portal, that portal’s own logic sits under web application penetration testing rather than the mobile test.
- Code and dependencies: The test examines input handling, release settings, libraries and exposed secrets. This can uncover debug functions or vulnerable components in a release build.
- Resilience and business logic: The tester challenges debugging, hooking, tampering and transaction controls. This can show whether someone can bypass a client-side restriction or alter a protected workflow.
Then, a structured vulnerability assessment identifies and prioritises possible weaknesses.
A penetration test then validates selected findings under controlled conditions, so your team can separate an exploitable issue from a scanner warning and fix the risks that matter first.
How Does a Mobile Application Penetration Test Work?
A mobile application penetration test moves through three stages: define the target and rules, test the app under controlled conditions, then report and retest the findings.
Because each stage sets up the next, weak scoping reduces test coverage and weak reporting slows remediation. Let’s step through it.
Scoping and Threat Modelling
Scoping defines what the tester may access, which techniques are allowed and where the test must stop. Hence, before testing begins, you should agree on:
- Android and iOS builds, supported operating system versions and test environment;
- User roles, test accounts, API endpoints and third-party integrations;
- Sensitive data, high-value actions and likely abuse paths;
- Permitted techniques, production safeguards and stop conditions; and
- Exclusions, test dates, escalation contacts and evidence-handling rules.
Consider threat modelling then ranks the paths that matter to your app.
Let’s say a payment app may prioritise account takeover and transaction manipulation, while a workforce app may focus on cached records and API permissions.
Then, we suggest choosing:
- Black box testing for an external attacker’s view
- Grey box testing for efficient role-based testing
- White box testing when you want broader code coverage and faster root-cause analysis.
Testing Execution
Testing execution checks whether a weakness creates usable access, exposed data or an unauthorised action. The tester combines automated discovery with manual work to:
- Map the app, entry points, roles and data flows;
- Inspect the package, configuration, storage and embedded components;
- Run the app on suitable test devices or emulators;
- Intercept traffic and manipulate requests, sessions and application state; and
- Exploit selected findings only far enough to prove impact.
Written rules, dedicated accounts and test data limit disruption.
If APIs are in scope, the tester also checks server-side authentication, object-level authorisation, input handling, rate controls and business logic. Where those services run in a cloud tenancy, the configuration and identity layer beneath them belongs to cloud penetration testing and needs its own scope.
If they are excluded, the report should say so before anyone relies on it as end-to-end assurance.
Reporting and Retesting
A penetration testing report turns verified weaknesses into work your developers can assign, fix and prove closed. It should give you:
- an executive summary and precise record of the tested scope;
- risk-rated findings linked to business impact;
- evidence and steps that developers can reproduce;
- affected components, limitations and recommended fixes; and
- priorities, owners and retesting needs.
Assign high-risk findings while the technical context is fresh. Once the fixes reach a stable build, retesting checks whether they close the attack path.
That validation gives customers, auditors or insurers stronger evidence than a report with open findings.
What Techniques Are Used in Mobile Application Penetration Testing?
A sound mobile application penetration testing methodology combines static analysis, dynamic analysis, reverse engineering and network traffic interception.
This practical form of offensive security uses each technique to show how your app is built, how it behaves and how it communicates.
Static Analysis
Static analysis reviews the app without running it. By examining source code or the compiled package, the tester can find hardcoded secrets, unsafe cryptography, excessive permissions, debug settings and risky data-storage logic.
Automated static code analysis speeds up discovery, although manual review is still needed because a code pattern does not prove exploitability.
Dynamic Analysis
Dynamic analysis tests the app while it runs. The tester observes files, memory, logs, authentication state and runtime calls, then changes inputs or application state to see whether your controls still hold.
This exposes problems such as weak session handling, sensitive data left in memory or a biometric check enforced only in the interface.
Reverse Engineering
Reverse engineering reveals logic hidden inside the compiled Android or iOS package. The tester decompiles or disassembles authorised builds to find concealed endpoints, embedded secrets, client-side decisions and tamper checks.
Because an attacker can inspect a released package, this technique shows whether sensitive controls depend on code the user can alter.
Network Traffic Interception
Network traffic interception captures and changes communications between your app and remote services.
It checks encryption, certificate validation, token handling and whether the server trusts client-controlled values.
Certificate pinning may require an authorised test build or controlled bypass, while full API testing still requires the relevant endpoints and server-side scenarios in scope.
Also, always remember that common mobile application penetration testing tools include static analysers, decompilers, debuggers, runtime instrumentation frameworks and interception proxies.
How Does Mobile Application Penetration Testing Differ Between Android and iOS?
Android and iOS testing pursues the same security goals, but each platform requires different packages, controls and test environments.
Ideally, your provider should test both builds separately because shared business logic does not remove native platform risk.
The comparison below shows where the test setup and evidence change between platforms:
| Test area | Android | iOS |
|---|---|---|
| Package and code | APK, DEX or Smali code, native libraries and app signing | IPA, Mach-O binaries, Swift or Objective-C artefacts, entitlements and code signing |
| App interaction | AndroidManifest.xml, exported components, intents, app links and WebViews | Info.plist, entitlements, URL schemes, universal links, app extensions and WKWebView |
| Local data | Files, databases, SharedPreferences, backups and Android Keystore | Sandbox files, databases, UserDefaults, backups, Data Protection and Keychain |
| Network controls | Network Security Configuration, TLS and custom trust logic | App Transport Security, URL loading APIs, TLS and custom trust logic |
| Runtime checks | Emulator or physical device, with controlled rooting or instrumentation where required | Simulator or physical device, with an authorised test build, debugging or controlled jailbreaking where required |
| Tamper resistance | Root detection, hooking, repackaging and integrity controls | Jailbreak detection, hooking, binary modification and integrity controls |
For instance, Android testing checks whether exported components expose sensitive functions to other apps. iOS testing checks whether entitlements or URL schemes grant unintended access.
Storage checks also follow the platform: Android provides the Android Keystore, while Apple provides Keychain data protection. Both platforms also copy app data into device backups, so the test should confirm what your data backup path carries off the device.
Cross-platform frameworks such as Flutter and React Native still produce native packages and use platform storage, networking and permissions.
Ideally, you should test the common code once where sensible, then test each platform-specific implementation.
When Does an Australian Business Need Mobile Application Penetration Testing?
You need mobile application penetration testing when your app creates material data, transaction or access risk, or when another party asks you to prove that its controls have been independently tested.
On that basis, arrange a test when any of these triggers applies:
- Before the first public or enterprise release;
- After a material change to authentication, payments, APIs, storage, cryptography or architecture;
- After adding a high-privilege SDK or taking ownership of code built by another team;
- After an incident, data breach or credible vulnerability report; or
- Before a customer review, tender, regulated procurement or cyber insurance review.
Once a trigger applies, define the evidence you need and the testing cadence. Those two decisions determine the scope, reporting format and timing covered below.
Compliance and Customer Requirements
Compliance and customer requirements determine what your test must cover, how independent it must be and what evidence you retain.
So, treat cybersecurity compliance as an evidence question: what applies, what control addresses it and what record proves the work?
Because each driver asks a different business question, use the table below to match it with the evidence a mobile test can provide:
| Driver | What it means for you | Practical value of the test |
|---|---|---|
| Privacy Act and APP 11 | Covered businesses must take reasonable steps to protect personal information they hold | A dated scope, report, remediation record and retest can support those steps, but do not establish compliance alone |
| ASD Information Security Manual | The ISM advises threat modelling, security testing and MASVS use; it is binding only when another lawful requirement makes it so | Your threat model and test record can show how your development process addresses the guidance |
| Customer review or tender | A buyer may ask for independent testing and proof that high-risk findings are closed | A shareable evidence pack can remove a procurement blocker, keep your bid eligible and help you compete for security-sensitive work |
| Cyber insurance | A proposal or renewal may ask about secure development, vulnerability management or testing | Current evidence supports accurate answers, but does not guarantee cover, better terms or claim acceptance |
If your sales or tender team receives security questionnaires, prepare a reusable pack with the tested build, scope, date, executive summary, remediation status and retest letter.
Because exploit details create risk, share the full report only with people who need it and under suitable confidentiality controls.
How Often Should a Mobile Application Be Tested?
Mobile applications should be tested before launch, after material security changes, and on a recurring risk‑based schedule.
An annual test is a common assurance baseline, but your penetration test frequency should reflect customer, insurer, or compliance requirements. Use the release or business event to decide the depth:
- First public or enterprise release: Run a full independent mobile application penetration test.
- Routine low-risk release: Run automated code, dependency and security checks, then target any changed sensitive functions.
- Authentication, payment, API, storage, SDK or architecture change: Run targeted manual testing. Use a full retest if the attack surface changed broadly.
- Customer-facing app with no major change: Use an annual independent test as a starting baseline unless a stricter requirement applies.
- Incident or credible vulnerability report: Test the affected path once contained, then validate the fix before relying on it.
This cadence links effort to change. It also keeps your evidence current, because a clean report for an old build says little about code or endpoints released afterwards.
What to Look for When Choosing a Mobile Application Penetration Testing Provider
You should choose a mobile application penetration testing provider that can test your exact platforms manually, define the boundaries clearly and give your developers evidence they can use.
When comparing mobile application penetration testing services in Australia, turn that principle into a practical checklist:
- Mobile capability: Look for recent Android and iOS experience, plus suitable credentials such as GIAC Mobile Device Security Analyst (GMOB).
- Method: Confirm that the provider manually validates findings and uses OWASP MASVS and MASTG where suitable.
- Scope: Require named builds, user roles, APIs, backend services, integrations, exclusions and an agreed access model.
- Safety: Check the written authorisation, production safeguards, stop conditions and evidence-handling process.
- Reporting: Ask for executive and technical views, reproducible findings, business impact and prioritised fixes.
- Remediation: Confirm that developers receive a debrief, technical clarification and a defined retest process.
- Assurance: Review a sanitised sample report, relevant references and the provider’s standard statement of limitations.
Ask who will perform the work, not only which certifications the company holds. Then compare the proposed test cases and deliverables against your threat model, customer request or assurance goal.
Secure Your Mobile Applications with Redscale
As you might know, weak mobile application security can let weak data storage, broken access controls, or exposed API behaviour surface during a customer review, delaying your release, tender, or compliance sign-off.
When these gaps appear late, your team faces rushed fixes, repeated assurance questions, and weaker evidence for prospective clients.
A scoped penetration test turns that uncertainty into defensible findings.
Redscale’s penetration testing service tests your Android or iOS app, validates exploitable risk, and retests agreed fixes before procurement deadlines.
If your buyer expects mobile-specific expertise, Redscale’s certifications include GMOB certification.
Book a free discussion with the Redscale team to prepare credible security evidence before your next client review.
