🔒 NDA Before Access · 📱 iOS & Android · 🛡️ OWASP MASVS Aligned · 📋 Fixed Scope & Price
Mobile App Security Audit for iOS & Android
Your app runs on devices you don't control, which attackers can download, decompile, and inspect. We find the weaknesses in your mobile app, its data storage, and the APIs behind it before they're exploited.
Anyone Can Download Your App and Look Inside
A mobile app is not like a website. Once it's published, every copy lives on a user's device, and anyone can download it, unpack it, read its code, and watch how it talks to your servers. If your app has secrets, weak checks, or unprotected APIs, they're discoverable.
A mobile app security audit is the right step if:
Your app handles logins, payments, health, financial, or personal data
You're launching on the App Store or Google Play for the first time
An enterprise client or partner requires a mobile security assessment
You're preparing for SOC 2, ISO 27001, HIPAA, GDPR, or PCI DSS readiness
Your app was built quickly with React Native, Flutter, FlutterFlow, or AI coding tools
Your backend API was designed for the app and never tested on its own
You've never had an independent security review of the mobile app
Common Vulnerabilities We Find in Mobile Apps
Vulnerability | What It Looks Like | Business Risk |
Hardcoded secrets | API keys, tokens, or credentials embedded in the app package | Attackers extract keys and abuse your paid services and data |
Insecure local storage | Tokens, personal data, or cached files stored unencrypted on the device | Data theft from lost, shared, or compromised devices |
Weak API authorization | Backend trusts the app and doesn't verify the user's permissions | Any user can access other users' data by calling the API directly |
Insecure network communication | Missing certificate validation, HTTP traffic, or disabled TLS checks | Traffic interception on public Wi-Fi |
Client-side-only security checks | Premium features, limits, or roles enforced only inside the app | Paid features unlocked for free, business rules bypassed |
Weak authentication and sessions | Long-lived tokens, no logout invalidation, weak biometric implementation | Account takeover |
Sensitive data in logs | Passwords, tokens, or personal data written to device logs | Data exposure through debugging tools and crash reports |
Excessive permissions | App requests location, contacts, or storage it doesn't need | Privacy violations, app store rejection, user distrust |
No code protection | Business logic and endpoints easy to read after decompiling | Easier reverse engineering, cloning, and tampering |
Vulnerable third-party SDKs | Outdated analytics, ads, or payment libraries | Inherited vulnerabilities and data leakage |
What Our Mobile Security Audit Covers
Area | What We Assess |
Data Storage | Keychain / Keystore usage, local databases, shared preferences, cached files, backups, clipboard, logs |
Cryptography | Encryption algorithms, key management, hardcoded keys, random number generation |
Authentication | Login flows, token storage, session expiry, biometric authentication, MFA, logout handling |
Network Security | TLS configuration, certificate validation, certificate pinning, cleartext traffic |
Platform Interaction | Permissions, deep links, intents, URL schemes, WebViews, exported components |
Code Quality & Secrets | Hardcoded credentials, debug code, dependency and SDK vulnerabilities |
Resilience | Obfuscation, root/jailbreak detection, tamper detection, anti-debugging (where required) |
Privacy | Data collection, third-party SDK data sharing, permission justification, consent handling |
Backend APIs | Authorization per endpoint, rate limiting, data exposure, object-level access control |
Cloud Configuration | Firebase rules, storage buckets, push notification keys, backend environment settings |
Built on Recognized Mobile Security Standards
Our methodology is aligned with the industry's leading mobile security frameworks:
OWASP MASVS: the Mobile Application Security Verification Standard, which defines what a secure mobile app must meet
OWASP MASTG: the Mobile Application Security Testing Guide, which defines how each control is tested
OWASP Mobile Top 10: the most critical mobile application security risks
OWASP API Security Top 10: for the backend APIs your app depends on
CWE and CVSS: standard weakness classification and consistent severity scoring
How We Test Mobile Apps
Static Analysis
We decompile and review the app package (APK/AAB for Android, IPA for iOS) and, where provided, the source code. This finds hardcoded secrets, insecure configurations, weak cryptography, and risky permissions.
Dynamic Analysis
We run the app on real and test devices, including rooted and jailbroken environments, and observe its behavior: what it stores, what it sends, how it handles sessions, and how it responds to tampering.
API and Backend Testing
We intercept and test the traffic between the app and your servers to confirm that the backend enforces security on its own and doesn't simply trust the app.
Combined Assessment (Recommended)
Static, dynamic, and API testing together. Most serious mobile vulnerabilities sit in the gap between the app and its backend, and only a combined assessment covers that gap.
Platforms and Technologies We Audit
Native: iOS (Swift, Objective-C) · Android (Kotlin, Java)
Cross-platform: React Native · Flutter · FlutterFlow · Ionic · Capacitor · Xamarin / .NET MAUI · Expo
Backends: Firebase · Supabase · Node.js · Python · Java · .NET · PHP · AWS Amplify
Integrations: Stripe · In-app purchases · OAuth / social login · Push notifications · Maps · Analytics and ad SDKs
How the Mobile Security Audit Works
1. Scoping Call
We review your app's features, user roles, data types, platforms, and backend, then agree on the scope and testing approach.
2. NDA and Authorization
We sign an NDA and a written testing authorization. Testing happens only on agreed builds, accounts, and environments.
3. App and Test Account Setup
You share the app build (TestFlight, Firebase App Distribution, APK/IPA, or store version), test accounts for each user role, and optional source code access.
4. Assessment
Our engineers carry out static, dynamic, and API testing, combining automated tools with manual analysis of authentication, data handling, and business logic.
5. Validation
Every finding is manually verified and reproduced, so you only receive real issues.
6. Report and Walkthrough
You receive a prioritized report and a walkthrough session with your mobile and backend developers.
7. Retest (Optional)
After fixes are released, we verify each one and issue an updated report.
What You Receive
Executive summary: the app's security posture and top risks, written for founders and stakeholders
Findings report: each issue with its platform, affected component, CWE classification, CVSS-based severity, and evidence
Reproduction steps: so your developers can confirm every finding
Platform-specific remediation: separate fixes for iOS, Android, cross-platform code, and the backend
OWASP MASVS coverage matrix: what was tested against each MASVS control group
Prioritized roadmap: what to fix before release, in the next update, and later
Walkthrough call: a findings session with your mobile and backend teams
Typical Mobile Security Audit Scenarios
These examples show common situations, the kinds of issues that typically surface, and how teams use the results.
Scenario 1: Fintech App Before Public Launch
Stack: React Native + Node.js API + PostgreSQL ·
Audit: Combined Assessment (iOS + Android + API)
Situation: A personal finance app that connects to users' bank data is weeks away from launch. Its banking partner requires an independent mobile security assessment before going live.
Common findings:
Access tokens stored in unencrypted AsyncStorage instead of the Keychain or Keystore
A transaction API that returns another user's data when the account ID is changed
No certificate pinning on connections to financial endpoints
Third-party API keys readable in the JavaScript bundle
What happens next: The team moves tokens to secure storage, fixes object-level authorization in the API, rotates the exposed keys, and adds certificate pinning. After a retest, they share the report with the banking partner and launch on schedule.
Scenario 2: Health and Fitness App Handling Personal Data
Stack: Flutter + Firebase ·
Audit: Combined Assessment
Situation:A wellness app that stores workout history, body measurements, and coaching notes is growing fast. The founders want to confirm that user data is protected before they approach corporate wellness clients.
Common findings:
Firebase Firestore rules letting any signed-in user read other users' profiles
Sensitive health notes cached in plain files on the device
Analytics SDK receiving more personal data than the privacy policy discloses
Permissions requested for contacts and location that no feature uses
What happens next: The team rewrites Firestore rules for per-user access, encrypts local caches, limits what the analytics SDK receives, and removes unused permissions. Corporate clients receive a clear security summary during procurement.
Scenario 3: On-Demand Services App With Paid Features
Stack: Native iOS (Swift) + Native Android (Kotlin) + Laravel API ·
Audit: Combined Assessment
Situation: A booking marketplace sees revenue from its premium subscription fall even as active users grow. The team suspects the paywall is being bypassed.
Common findings:
Premium status checked only inside the app, never verified by the API
In-app purchase receipts not validated server-side
No root or jailbreak detection on an app that stores payment references
Debug logs printing session tokens in production builds
What happens next: The team moves subscription checks and receipt validation to the backend, removes debug logging from release builds, and adds tamper detection. Paywall bypass stops and subscription revenue recovers.
Mobile Security Audit Pricing
Focused Mobile Audit
Starting at $999 · 5–7 business days
For early-stage apps that need a security baseline on one platform.
One platform (iOS or Android)
Static analysis of the app package
Data storage, secrets, and network security review
OWASP Mobile Top 10 coverage
Prioritized findings report
30-minute walkthrough call
Combined Mobile Audit
Starting at $2,499 · 2–3 weeks
For apps with real users, sensitive data, payments, or partner requirements.
iOS and Android
Static, dynamic, and backend API testing
OWASP MASVS and OWASP API Security Top 10 coverage
CWE-classified findings with CVSS-based severity
Platform-specific remediation guidance
MASVS coverage matrix
60-minute walkthrough call
One free retest within 30 days
Get a Combined Mobile Audit → (Most Popular)
Enterprise Mobile Assessment
Custom pricing · 3–6 weeks
For multiple apps, complex backends, or regulated industries.
Multiple apps, platforms, and environments
Resilience testing (anti-tampering, reverse engineering protection)
Cloud and backend security posture review
Compliance control gap mapping (SOC 2, ISO 27001, HIPAA, PCI DSS, GDPR)
Executive and technical reports
Stakeholder presentation and remediation planning
Final pricing depends on the number of platforms, app features, user roles, and API endpoints. Confirmed after a free scoping call.
Mobile Security Audit vs Related Services
Service | What It Answers | When to Choose It |
Mobile App Security Audit | Is my iOS or Android app, and the API behind it, secure? | You have a published or soon-to-launch mobile app |
Web Application Security Audit | Where is my web app vulnerable, and how do I fix it? | Your product is primarily a web application |
AI-Generated Code Audit | Is my AI-built app secure, stable, and production-ready? | Your app was built with Claude Code, Lovable, Bolt, or Cursor |
Penetration Test | Can an attacker break in from the outside right now? | You need formal external attack simulation for compliance |
Also have a web app? See our Web Application Security Audit →
Built with AI coding tools? Start with our AI-Generated Code Audit →
After the Audit: Fix It With Our Engineers
If your team doesn't have the time or mobile security expertise to act on the findings, our iOS, Android, and backend engineers can fix them.
Secure storage migration (Keychain / Keystore)
API authorization and backend hardening
Certificate pinning and network security fixes
Secrets removal and key rotation
Server-side receipt and subscription validation
Obfuscation and tamper detection
Retest and verification before release
Get Help Fixing Mobile Security Issues →
Frequently Asked Questions
What is a mobile app security audit?
It's a structured assessment of an iOS or Android app, and the APIs it depends on, that identifies vulnerabilities in data storage, authentication, network communication, code, and backend authorization, and recommends how to fix them.
How much does a mobile app security audit cost?
A Focused Mobile Audit for one platform starts at $999, and a Combined Mobile Audit covering iOS, Android, and the backend API starts at $2,499. Enterprise assessments are priced by scope. The final price is fixed after a free scoping call.
How long does a mobile app security audit take?
A Focused Mobile Audit takes 5–7 business days. A Combined Mobile Audit takes 2–3 weeks.
Do you need our source code?
Not necessarily. We can test the compiled app (APK/AAB or IPA) and its API traffic without source code. Source code access lets us find root causes faster and give more precise fixes.
Do you test React Native and Flutter apps?
Yes. We audit native iOS and Android apps as well as cross-platform apps built with React Native, Flutter, FlutterFlow, Ionic, Capacitor, Expo, and .NET MAUI.
Which standards do you follow?
Our methodology is aligned with OWASP MASVS, OWASP MASTG, the OWASP Mobile Top 10, and the OWASP API Security Top 10. Findings are classified by CWE and prioritized using CVSS-based severity.
Do you test the backend API as well?
Yes, in the Combined and Enterprise audits. Many serious mobile vulnerabilities are really backend authorization issues, so testing the API is essential.
Will testing affect our live users?
We test on agreed builds and dedicated test accounts, ideally against a staging backend. If production testing is required, safe methods and time windows are agreed in writing first.
Will you sign an NDA?
Yes. We sign an NDA and a written testing authorization before any access to your app, code, or systems.
Do you retest after we release fixes?
Yes. The Combined Mobile Audit includes one free retest within 30 days, and retesting can be added to any other plan.
Protect Your Users Before Your App Reaches Their Devices
Get an independent, OWASP-aligned security assessment of your iOS and Android apps and the APIs behind them.