diff --git a/android/app/src/androidTest/java/org/whoneedhelp/mobile/CrossClientStagingInstrumentedTest.java b/android/app/src/androidTest/java/org/whoneedhelp/mobile/CrossClientStagingInstrumentedTest.java
index f31f122..683266b 100644
--- a/android/app/src/androidTest/java/org/whoneedhelp/mobile/CrossClientStagingInstrumentedTest.java
+++ b/android/app/src/androidTest/java/org/whoneedhelp/mobile/CrossClientStagingInstrumentedTest.java
@@ -48,8 +48,8 @@ public final class CrossClientStagingInstrumentedTest {
             waitForElement("remember-login-button");
             click("remember-login-button");
             waitForElementText(
-                "main-content",
-                "Help can be closer than you think."
+                "home-title",
+                "Need help nearby? Ask the community."
             );
         }
 
diff --git a/scripts/android-browser-staging-e2e.sh b/scripts/android-browser-staging-e2e.sh
index 6dacb1b..0f570c8 100755
--- a/scripts/android-browser-staging-e2e.sh
+++ b/scripts/android-browser-staging-e2e.sh
@@ -41,6 +41,12 @@ browser_image="who-need-help-e2e-tests:android-$run_id"
 android_image="who-need-help-android:$variant-cross-client-$run_id"
 container="who-need-help-android-$variant-cross-client-$run_id"
 avd_volume="who-need-help-android-avd-$variant-cross-client-$run_id"
+# Android's Automated Test Device image removes applications and background
+# services that are unrelated to app-level automation. Keep the API 37/16 KB
+# compatibility coverage in the instrumentation matrix and public smoke test;
+# use the Google ATD image for this resource-intensive two-client workflow.
+android_api=35
+android_system_image=system-images/android-35/google_atd/x86_64
 service_class=org.whoneedhelp.mobile.TrackingService
 fixture_password="$(openssl rand -hex 24)"
 android_message="android-$run_id"
@@ -123,6 +129,10 @@ if [[ ! -s "$TEST_APK" ]]; then
   exit 1
 fi
 
+"$ROOT/scripts/verify-android-artifact-source.sh" \
+  "$ROOT/android/dist-$variant" \
+  "$build_script"
+
 set -a
 # shellcheck source=/dev/null
 . "$ENV_FILE"
@@ -645,8 +655,7 @@ docker build \
   --build-arg "WNH_DEBUG_BASE_URL=$WNH_BASE_URL" \
   --build-arg "WNH_TRACKING_MIN_TIME_MS=$WNH_TRACKING_MIN_TIME_MS" \
   --build-arg "WNH_TRACKING_HTTP_TIMEOUT_MS=$WNH_TRACKING_HTTP_TIMEOUT_MS" \
-  --build-arg \
-    "ANDROID_EMULATOR_SYSTEM_IMAGE=system-images/android-37.0/google_apis_ps16k/x86_64" \
+  --build-arg "ANDROID_EMULATOR_SYSTEM_IMAGE=$android_system_image" \
   --target emulator \
   --tag "$android_image" \
   android >"$output_dir/android-image-build.log"
@@ -808,7 +817,8 @@ fi
 
 {
   printf 'run_id=%s\n' "$run_id"
-  printf 'android_api=37.0\n'
+  printf 'android_api=%s\n' "$android_api"
+  printf 'android_system_image=%s\n' "$android_system_image"
   printf 'package=%s\n' "$package"
   printf 'public_origin=%s\n' "$WNH_BASE_URL"
   printf 'magic_link_login=true\n'
diff --git a/scripts/android-development-build.sh b/scripts/android-development-build.sh
index 722ad82..d257d70 100755
--- a/scripts/android-development-build.sh
+++ b/scripts/android-development-build.sh
@@ -58,6 +58,9 @@ docker build \
   --output "type=local,dest=$ROOT/android/dist-development" \
   "$ROOT/android"
 
+"$ROOT/scripts/android-source-fingerprint.sh" \
+  >"$ROOT/android/dist-development/source-fingerprint.sha256"
+
 "$ROOT/scripts/android-app-links-verify.sh" \
   "$ENV_FILE" \
   "$ROOT/android/dist-development" \
diff --git a/scripts/android-release-build.sh b/scripts/android-release-build.sh
index 1d0d130..5ec9dff 100755
--- a/scripts/android-release-build.sh
+++ b/scripts/android-release-build.sh
@@ -72,6 +72,9 @@ docker build \
   --output "type=local,dest=$OUTPUT_DIR" \
   "$ROOT/android"
 
+"$ROOT/scripts/android-source-fingerprint.sh" \
+  >"$OUTPUT_DIR/source-fingerprint.sha256"
+
 for artifact in \
   "$OUTPUT_DIR/who-need-help-release.apk" \
   "$OUTPUT_DIR/who-need-help-release.aab" \
@@ -79,6 +82,7 @@ for artifact in \
   "$OUTPUT_DIR/package-name.txt" \
   "$OUTPUT_DIR/bundle-signing-verification.txt" \
   "$OUTPUT_DIR/bundletool-validation.txt" \
+  "$OUTPUT_DIR/source-fingerprint.sha256" \
   "$OUTPUT_DIR/lint-results-release.html"; do
   if [ ! -s "$artifact" ]; then
     echo "Android release build did not export the expected artifact: $artifact" >&2
diff --git a/scripts/android-source-fingerprint.sh b/scripts/android-source-fingerprint.sh
new file mode 100755
index 0000000..cd75a13
--- /dev/null
+++ b/scripts/android-source-fingerprint.sh
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT=$(CDPATH='' cd -- "$(dirname -- "$0")/.." && pwd)
+
+mapfile -d '' -t source_files < <(
+  git -C "$ROOT" ls-files \
+    --cached \
+    --others \
+    --exclude-standard \
+    -z \
+    -- android |
+    LC_ALL=C sort -z
+)
+
+if [[ "${#source_files[@]}" -eq 0 ]]; then
+  echo "No Android source files were found." >&2
+  exit 1
+fi
+
+{
+  for relative_path in "${source_files[@]}"; do
+    absolute_path="$ROOT/$relative_path"
+
+    if [[ ! -f "$absolute_path" ]]; then
+      echo "Android source input is not a regular file: $relative_path" >&2
+      exit 1
+    fi
+
+    printf '%s\0' "$relative_path"
+    sha256sum "$absolute_path" | awk '{print $1}'
+  done
+} | sha256sum | awk '{print $1}'
diff --git a/scripts/android-staging-build.sh b/scripts/android-staging-build.sh
index faf86e6..4001e56 100755
--- a/scripts/android-staging-build.sh
+++ b/scripts/android-staging-build.sh
@@ -59,6 +59,9 @@ docker build \
   --output "type=local,dest=$ROOT/android/dist-staging" \
   "$ROOT/android"
 
+"$ROOT/scripts/android-source-fingerprint.sh" \
+  >"$ROOT/android/dist-staging/source-fingerprint.sha256"
+
 "$ROOT/scripts/android-app-links-verify.sh" \
   "$ENV_FILE" \
   "$ROOT/android/dist-staging" \
diff --git a/scripts/android-staging-smoke.sh b/scripts/android-staging-smoke.sh
index d9db9ce..f32210e 100755
--- a/scripts/android-staging-smoke.sh
+++ b/scripts/android-staging-smoke.sh
@@ -57,6 +57,10 @@ if [ ! -s "$TEST_APK" ]; then
   exit 1
 fi
 
+"$ROOT/scripts/verify-android-artifact-source.sh" \
+  "$ROOT/android/dist-$variant" \
+  "$build_script"
+
 set -a
 # shellcheck source=/dev/null
 . "$ENV_FILE"
diff --git a/scripts/quality.sh b/scripts/quality.sh
index 428111e..39b498d 100755
--- a/scripts/quality.sh
+++ b/scripts/quality.sh
@@ -30,6 +30,7 @@ socket_proxy_container="wnh-socket-proxy-audit-$run_id"
 scan_dir=$(mktemp -d "${TMPDIR:-/tmp}/wnh-quality-scan.XXXXXX")
 scan_list="${scan_dir}.files"
 scan_tar="${scan_dir}.tar"
+android_fingerprint_probe="$ROOT/android/.quality-source-fingerprint-$run_id"
 
 umask 077
 QUALITY_POSTGRES_USER="wnh_quality_$(openssl rand -hex 6)"
@@ -49,6 +50,7 @@ cleanup() {
     "$boundary_mock_image" "$socket_proxy_image" "$postgis_image" \
     "$caddy_image" "$traefik_image" \
     >/dev/null 2>&1 || true
+  rm -f "$android_fingerprint_probe"
   rm -rf "$scan_dir" "$scan_list" "$scan_tar"
 }
 trap cleanup EXIT HUP INT TERM
@@ -97,6 +99,47 @@ grep -Fx '/.runner' .dockerignore >/dev/null
 grep -Fx '/act_runner' .dockerignore >/dev/null
 grep -Fx '/act_runner-data/' .dockerignore >/dev/null
 
+echo "Checking Android artifacts are bound to their exact source tree"
+android_fingerprint_before=$(./scripts/android-source-fingerprint.sh)
+android_artifact_probe="$scan_dir/android-artifact"
+mkdir "$android_artifact_probe"
+printf '%s\n' "$android_fingerprint_before" \
+  >"$android_artifact_probe/source-fingerprint.sha256"
+./scripts/verify-android-artifact-source.sh \
+  "$android_artifact_probe" \
+  scripts/android-development-build.sh >/dev/null
+
+printf '%s\n' 'quality source mutation' >"$android_fingerprint_probe"
+android_fingerprint_after=$(./scripts/android-source-fingerprint.sh)
+if [ "$android_fingerprint_before" = "$android_fingerprint_after" ]; then
+  echo "Android source fingerprint did not change for a source mutation." >&2
+  exit 1
+fi
+if ./scripts/verify-android-artifact-source.sh \
+  "$android_artifact_probe" \
+  scripts/android-development-build.sh >/dev/null 2>&1; then
+  echo "Android artifact verifier accepted stale source inputs." >&2
+  exit 1
+fi
+
+rm -f "$android_fingerprint_probe"
+test "$(./scripts/android-source-fingerprint.sh)" = "$android_fingerprint_before"
+printf '%s\n' malformed >"$android_artifact_probe/source-fingerprint.sha256"
+if ./scripts/verify-android-artifact-source.sh \
+  "$android_artifact_probe" \
+  scripts/android-development-build.sh >/dev/null 2>&1; then
+  echo "Android artifact verifier accepted a malformed fingerprint." >&2
+  exit 1
+fi
+rm -f "$android_artifact_probe/source-fingerprint.sha256"
+if ./scripts/verify-android-artifact-source.sh \
+  "$android_artifact_probe" \
+  scripts/android-development-build.sh >/dev/null 2>&1; then
+  echo "Android artifact verifier accepted a missing fingerprint." >&2
+  exit 1
+fi
+unset android_fingerprint_before android_fingerprint_after
+
 echo "Checking atomic environment credential imports"
 credential_env="$scan_dir/credentials.env"
 cp .env.example "$credential_env"
diff --git a/scripts/verify-android-artifact-source.sh b/scripts/verify-android-artifact-source.sh
new file mode 100755
index 0000000..49c8147
--- /dev/null
+++ b/scripts/verify-android-artifact-source.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+set -eu
+
+ROOT=$(CDPATH='' cd -- "$(dirname -- "$0")/.." && pwd)
+artifact_dir=${1:-}
+build_command=${2:-the matching Android build script}
+
+if [ -z "$artifact_dir" ]; then
+  echo "usage: $0 ARTIFACT_DIR [BUILD_COMMAND]" >&2
+  exit 2
+fi
+
+case "$artifact_dir" in
+  /*) ;;
+  *) artifact_dir="$ROOT/$artifact_dir" ;;
+esac
+
+fingerprint_file="$artifact_dir/source-fingerprint.sha256"
+
+if [ ! -s "$fingerprint_file" ]; then
+  echo "Android artifacts do not record their source fingerprint: $fingerprint_file" >&2
+  echo "Run $build_command before using these artifacts." >&2
+  exit 1
+fi
+
+expected=$(tr -d '\r\n' <"$fingerprint_file")
+actual=$("$ROOT/scripts/android-source-fingerprint.sh")
+
+if ! printf '%s\n' "$expected" | grep -Eq '^[0-9a-f]{64}$'; then
+  echo "Android artifact source fingerprint is malformed." >&2
+  exit 1
+fi
+
+if [ "$expected" != "$actual" ]; then
+  echo "Android artifacts are stale relative to the current Android source." >&2
+  echo "Run $build_command before smoke or cross-client testing." >&2
+  exit 1
+fi
+
+printf 'Verified Android artifact source fingerprint: %s\n' "$actual"