Security testing for mobile apps and the APIs behind them.
Manual security assessments for iOS and Android applications, carried out by specialists with a background in reverse engineering and bug bounty research.
Money movement and identity are the critical paths. We test whether they can be bypassed or manipulated from the app.
Transfers and payments: changing amounts, recipients or limits
Login, biometrics, one-time codes and device binding
Session handling between the app and the bank's backend
How well the app resists tampering on rooted or jailbroken devices
Transportation & Mobility
Ride-hailing, car sharing, ticketing and connected vehicle apps, where the app often controls something in the physical world.
Booking, fare and payment logic: free or underpriced trips
Exposure and spoofing of rider and driver locations
Remote commands such as unlock or start, and who can send them
Ticket and QR code validation: reuse and forgery
E-commerce & Retail
Checkout, promotions and customer accounts are where abuse turns directly into financial loss.
Checkout: tampering with prices, quantities and discounts
Coupons, loyalty points and gift card abuse
Account takeover through login and password reset flows
One customer being able to see another customer's orders or data
Healthcare
Health data is among the most sensitive data an app can hold. We check where it goes and who can reach it.
Access to records, results and prescriptions across patients
Health data stored on the device and in backups
Appointment and messaging flows between patients and providers
Data shared with third-party SDKs and analytics tools
Process
01
Scoping
We agree on targets, test accounts, timeline and rules of engagement.
02
Manual assessment
Hands-on testing of the app and its APIs, supported by tooling where it helps.
03
Reporting
Risk ratings, reproduction steps and remediation guidance for each issue.
04
Retesting
Once fixes are in place, we verify them and update the report.
Engagement details
You provide
App builds (IPA / APK), test accounts and API documentation if available.
You receive
A written report with risk ratings, reproduction steps and remediation guidance.
Retest
Included. Fixes are verified and the report is updated.
Confidentiality
Findings and app data are shared only with your team.
About
A specialist, not a generalist.
PRBX Security is an independent security practice focused on mobile applications and APIs. The work is grounded in hands-on research: most of our findings to date have come from mobile apps.
Standards & credentials
OWASP MASVS
OWASP MASTG
OWASP API Top 10
OSWE certified
Direct access to the tester
The person you talk to during scoping is the person doing the testing.
Manual, in-depth testing
Automated scanners are a starting point. Most impactful issues are found by hand.
Reverse engineering experience
Being able to look inside the app binary means less is left untested.
Reports developers can use
Findings are written to be understood and fixed, not just listed.
FAQ
Do you need our source code?
No. We test the compiled app the same way an attacker would. Access to source code can make testing faster and deeper, but it is optional.
How long does an assessment take?
It depends on the size of the app and its API. We agree on a timeline during scoping, before any work starts.
Will testing affect our production users?
We prefer a staging environment and dedicated test accounts. If production is in scope, limits and timing are agreed in advance.
Can you sign an NDA?
Yes. We can sign your NDA before scoping, so you can share details about the app freely.
Contact
Planning a security assessment?
Tell us a little about your app. We'll get back to you to discuss scope and timing.