Android app security guides
Plain-English explainers on rooting, SSL pinning, accessibility services, sideloading and APK analysis — the concepts behind what App Checker shows you.
Android App Permissions Explained: Normal, Dangerous and Special
How Android app permissions work: normal, runtime (dangerous) and special permissions, what one-time and auto-reset do, and how to read an app's list.
What Is ADB (Android Debug Bridge)? What It Does and Why Parents Should Know
What ADB is, how USB and wireless debugging work, the commands people use to pull and install apps, the security risks, and why developer options matter.
APK vs AAB: What Is an Android App Bundle and Which One Do You Analyze?
The difference between an APK and an AAB (Android App Bundle), how Google Play turns bundles into APKs, why split APKs exist, and which file to analyze.
How Android App Signing Works: Keys, Certificates and APK Signature Schemes
How Android app signing works: why every APK is signed, the v1, v2 and v3 signature schemes, Play App Signing keys, and how to verify an APK's certificate.
Android Deep Links vs App Links: How They Work and How to Check Them
The difference between Android deep links and verified App Links, how Digital Asset Links verification works, the security risks, and how to read them.
Android Manifest Security Flags: debuggable, allowBackup, Cleartext and Exported
The AndroidManifest settings that matter for security: debuggable, allowBackup, cleartext traffic, exported components and more, with safe defaults for each.
What Is Rooting in Android? Risks, Benefits and How Apps Detect It
What rooting an Android phone actually means, why people do it, the security risks it creates, and how banking and security apps detect a rooted device.
What Is SSL Pinning in Android Apps? How It Works and Where It Falls Short
SSL (certificate) pinning explained for Android: what it protects against, how to configure it, the rotation risks, and what it cannot stop.
What Is Android's Accessibility Service, and Why Do Some Apps Ask for It?
What the Android Accessibility Service is for, why parental-control and automation apps request it, how malware abuses it, and when to allow it.
How to Analyze an APK: A Beginner's Guide to Android Static Analysis
A step-by-step beginner's guide to analyzing an Android APK: getting the file, reading the manifest, checking permissions, signatures and code, safely.
What Is Sideloading on Android? Risks, Safeguards and Google's New Verification Rules
Sideloading means installing Android apps outside Google Play. How it works, the real risks, how to check an APK first, and Google's new verification plan.
Mobile App Security Best Practices: An Android Developer Checklist
A practical Android security checklist built on the OWASP MASVS: storage, crypto, auth, network, platform, code, resilience and privacy, plus manifest checks.