README.md

Runtime security checks

Checks that run inside your application, on the device. Each one reports signals with confidence and evidence — never a bare boolean, and never a claim that a device is definitely clean.

Check	Platforms	Documentation
Root detection	Android	root-detection.md
Jailbreak detection	iOS	jailbreak-detection.md
Debugger detection	Android · iOS	android · ios
Emulator detection	Android	emulator-detection.md
Simulator detection	iOS	simulator-detection.md
Hook / instrumentation detection	Android · iOS	android · ios
App integrity	Android · iOS	android · ios
Secure hardware	Android · iOS	android · ios
Biometrics	Android · iOS	android · ios
Network posture	Android · iOS	android · ios
Screen capture	Android · iOS	screen-security.md

Topic	Documentation
How the risk score is calculated	risk-scoring.md
Expressing what your app should do about a result	security-policy.md
What has and has not been verified on hardware	validation.md

How to read a check page

Every page answers the same questions: what the check detects, how it works, which signals it uses, what confidence they carry, its false positives and false negatives, its platform limitations, and what your application should do about a result.

Two conventions run through all of them:

• unknown is not secure. A probe that could not run produces indeterminate, and any indeterminate signal downgrades the whole check to unknown. Absence of evidence is never reported as evidence of absence.
• Confidence comes from corroboration. A single filesystem path is weak evidence, however severe root access would be. Confidence rises when independent signals agree.

What none of these pages will claim

No check here is bypass-proof, and none of them can prove a device is uncompromised. They run inside the process they protect, which means an attacker with code execution in that process can interfere with the checks themselves. What they buy is cost: they raise the effort required from "attach and go" to "attach, then hide".

Real trust decisions belong on a server, informed by hardware-backed attestation — Play Integrity on Android, App Attest on iOS.