About

APK Signer is a clean, on-device utility for signing and managing APKs directly on Android. Built around Google's apksig library ported for Android (com.github.MuntashirAkon:apksig-android:4.4.0), it provides full support for V1, V2, and V3 signing schemes while automatically preserving existing 4-byte resource alignments. The app includes a built-in AOSP testkey, supports custom .keystore, .jks, and .p12 files, and features an integrated generator for creating RSA 2048-bit keys. All signed APKs and generated keystores are saved cleanly inside your public Documents/ApkSigner/ directory for easy access.