diff --git a/pyproject.toml b/pyproject.toml
index 94b67f4..e34d8a6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "vpnapp"
-version = "0.1.0"
+version = "0.1.1"
 description = "Private Android/Desktop VPN and proxy client with a small subscription backend."
 readme = "README.md"
 requires-python = ">=3.12,<3.14"
@@ -31,6 +31,7 @@ product = "VPN App"
 company = "SNW"
 copyright = "Copyright (C) 2026 SNW"
 platforms = ["android", "linux", "windows"]
+build_number = 2
 
 [tool.flet.app]
 path = "."
diff --git a/scripts/build-android.sh b/scripts/build-android.sh
index 4302f72..a491a9f 100755
--- a/scripts/build-android.sh
+++ b/scripts/build-android.sh
@@ -64,3 +64,4 @@ EOF
 fi
 
 uv run flet build apk --project vpn-app --org su.snw --artifact vpn-app-arm64 --arch arm64-v8a
+./scripts/verify-android-apk.sh build/apk/vpn-app-arm64.apk 2 0.1.1
diff --git a/scripts/verify-android-apk.sh b/scripts/verify-android-apk.sh
new file mode 100755
index 0000000..856e74c
--- /dev/null
+++ b/scripts/verify-android-apk.sh
@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+APK_PATH="${1:-build/apk/vpn-app-arm64.apk}"
+EXPECTED_VERSION_CODE="${2:-2}"
+EXPECTED_VERSION_NAME="${3:-0.1.1}"
+EXPECTED_CERT_SHA256="${VPN_ANDROID_CERT_SHA256:-21d36442ec814833725cee45306daec63960fc988cd1c8705665ecf7d3b7f63d}"
+ANDROID_SDK_PATH="${ANDROID_SDK_ROOT:-${ANDROID_HOME:-/home/snw/Android/sdk}}"
+
+if [[ ! -f "$APK_PATH" ]]; then
+  echo "APK not found: $APK_PATH" >&2
+  exit 2
+fi
+
+BUILD_TOOLS_DIR="$(find "$ANDROID_SDK_PATH/build-tools" -mindepth 1 -maxdepth 1 -type d -print | sort -V | tail -n 1)"
+AAPT="$BUILD_TOOLS_DIR/aapt"
+APKSIGNER="$BUILD_TOOLS_DIR/apksigner"
+ZIPALIGN="$BUILD_TOOLS_DIR/zipalign"
+
+for tool in "$AAPT" "$APKSIGNER" "$ZIPALIGN"; do
+  if [[ ! -x "$tool" ]]; then
+    echo "Required Android build tool not found: $tool" >&2
+    exit 2
+  fi
+done
+
+unzip -tqq "$APK_PATH"
+
+BADGING="$($AAPT dump badging "$APK_PATH")"
+EXPECTED_PACKAGE="package: name='su.snw.vpn_app' versionCode='$EXPECTED_VERSION_CODE' versionName='$EXPECTED_VERSION_NAME'"
+if [[ "$BADGING" != *"$EXPECTED_PACKAGE"* ]]; then
+  echo "Unexpected package or version metadata" >&2
+  echo "Expected: $EXPECTED_PACKAGE" >&2
+  echo "$BADGING" | head -n 1 >&2
+  exit 3
+fi
+
+NATIVE_CODE="$(printf '%s\n' "$BADGING" | sed -n "s/^native-code: //p")"
+if [[ "$NATIVE_CODE" != "'arm64-v8a'" ]]; then
+  echo "Unexpected native ABI set: ${NATIVE_CODE:-none}" >&2
+  exit 3
+fi
+
+SIGNATURE_REPORT="$($APKSIGNER verify --verbose --print-certs "$APK_PATH")"
+CERT_SHA256="$(printf '%s\n' "$SIGNATURE_REPORT" | sed -n 's/^Signer #1 certificate SHA-256 digest: //p' | tr -d ':[:space:]' | tr '[:upper:]' '[:lower:]')"
+if [[ "$CERT_SHA256" != "$EXPECTED_CERT_SHA256" ]]; then
+  echo "Unexpected signing certificate SHA-256: $CERT_SHA256" >&2
+  exit 3
+fi
+
+$ZIPALIGN -c -P 16 -v 4 "$APK_PATH" >/dev/null
+
+APK_SIZE="$(stat -c '%s' "$APK_PATH")"
+APK_SHA256="$(sha256sum "$APK_PATH" | cut -d ' ' -f 1)"
+echo "APK verification passed"
+echo "  file: $APK_PATH"
+echo "  package: su.snw.vpn_app"
+echo "  version: $EXPECTED_VERSION_NAME ($EXPECTED_VERSION_CODE)"
+echo "  ABI: arm64-v8a"
+echo "  size: $APK_SIZE bytes"
+echo "  SHA-256: $APK_SHA256"
diff --git a/uv.lock b/uv.lock
index 0e2b0b3..db9fab1 100644
--- a/uv.lock
+++ b/uv.lock
@@ -371,7 +371,7 @@ requires-dist = [{ name = "flet", specifier = ">=0.86.0" }]
 
 [[package]]
 name = "vpnapp"
-version = "0.1.0"
+version = "0.1.1"
 source = { virtual = "." }
 dependencies = [
     { name = "flet" },