diff --git a/.github/workflows/build-unified.yml b/.github/workflows/build-unified.yml
index c83a73190df..72c6c732ae1 100644
--- a/.github/workflows/build-unified.yml
+++ b/.github/workflows/build-unified.yml
@@ -54,7 +54,9 @@ jobs:
         id: zizmor
         uses: zizmorcore/zizmor-action@5f14fd08f7cf1cb1609c1e344975f152c7ee938d # v0.5.6
         with:
-          inputs: .github/workflows/build-unified.yml
+          inputs: |
+            .github/workflows/build-unified.yml
+            .github/workflows/distribute-dev-firebase.yml
           version: 1.25.2
           persona: pedantic
           min-severity: informational
diff --git a/.github/workflows/distribute-dev-firebase.yml b/.github/workflows/distribute-dev-firebase.yml
new file mode 100644
index 00000000000..03354d9b3ad
--- /dev/null
+++ b/.github/workflows/distribute-dev-firebase.yml
@@ -0,0 +1,117 @@
+name: "Distribute Dev Build"
+
+on:
+  workflow_dispatch:
+    inputs:
+      pull-request:
+        description: "PR number whose existing DevDebug artifact should be uploaded, i.e. 123; leave empty to build the selected branch"
+        required: false
+        type: number
+      release-notes:
+        description: "Help testers know what to test in this build, i.e. refactor navigation, meetings M1, etc."
+        required: true
+        type: string
+
+permissions:
+  actions: read # required to find and download DevDebug artifacts from PR build runs
+  contents: read # required to check out the selected branch
+  pull-requests: read # required to resolve the PR head commit
+
+concurrency:
+  group: firebase-app-distribution-dev-${{ inputs.pull-request || github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  distribute:
+    name: Distribute DevDebug
+    runs-on: warp-ubuntu-2404-x64-8x
+    timeout-minutes: 45
+    steps:
+      - name: Checkout selected branch
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          persist-credentials: false
+          submodules: recursive
+          fetch-depth: 1
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@0f481fcb613427c0f801b606911222b5b6f3083a # v5.5.0
+        with:
+          java-version: "21"
+          distribution: temurin
+
+      - name: Restore Gradle cache
+        uses: WarpBuilds/cache@40f3443ae7b70e568d6e2070ea897f3df94d7553 # v1
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Validate Gradle wrapper
+        uses: gradle/actions/wrapper-validation@50e97c2cd7a37755bbfafc9c5b7cafaece252f6e # v6.1.0
+
+      - name: Set up Node.js
+        uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6
+        with:
+          node-version: 24
+
+      - name: Resolve DevDebug APK
+        id: apk
+        env:
+          GH_TOKEN: ${{ github.token }}
+          PULL_REQUEST: ${{ inputs.pull-request }}
+          DATADOG_APP_ID: ${{ secrets.DATADOG_APP_ID }}
+          DATADOG_CLIENT_TOKEN: ${{ secrets.DATADOG_CLIENT_TOKEN }}
+          DOMAIN_REMOVAL_KEYS_FOR_REPAIR: ${{ secrets.DOMAIN_REMOVAL_KEYS_FOR_REPAIR }}
+        run: |
+          find_dev_debug_apk() {
+            local search_root="$1"
+            local -a apks
+            mapfile -t apks < <(find "${search_root}" -type f -path '*/apk/dev/debug/*.apk' -print)
+            (( ${#apks[@]} == 1 )) || {
+              echo "Expected exactly one DevDebug APK in ${search_root}, found ${#apks[@]}"
+              return 1
+            }
+            printf '%s\n' "${apks[0]}"
+          }
+
+          if [[ -n "${PULL_REQUEST}" ]]; then
+            [[ "${PULL_REQUEST}" =~ ^[0-9]+$ ]] || { echo "pull-request must be a number"; exit 1; }
+
+            head_sha="$(gh pr view "${PULL_REQUEST}" --repo "${GITHUB_REPOSITORY}" --json headRefOid --jq .headRefOid)"
+            source_run_id="$(gh api "repos/${GITHUB_REPOSITORY}/actions/workflows/build-develop-pr.yml/runs?event=pull_request&head_sha=${head_sha}&status=success&per_page=1" --jq '.workflow_runs[0].id // empty')"
+            [[ -n "${source_run_id}" ]] || { echo "No successful Develop PR build found for PR #${PULL_REQUEST}"; exit 1; }
+
+            gh run download "${source_run_id}" --repo "${GITHUB_REPOSITORY}" --name Dev-Debug-artifacts --dir downloaded-artifacts
+            apk_path="$(find_dev_debug_apk downloaded-artifacts)"
+          else
+            ./gradlew :app:assembleDevDebug
+            apk_path="$(find_dev_debug_apk app/build/outputs)"
+          fi
+
+          [[ -n "${apk_path}" && -f "${apk_path}" ]] || { echo "DevDebug APK was not found"; exit 1; }
+          echo "path=${apk_path}" >> "${GITHUB_OUTPUT}"
+
+      - name: Upload to Firebase App Distribution
+        env:
+          FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_JSON: ${{ secrets.FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_JSON }}
+          FIREBASE_APP_DISTRIBUTION_GROUPS: ${{ vars.FIREBASE_APP_DISTRIBUTION_GROUPS }}
+          APK_PATH: ${{ steps.apk.outputs.path }}
+          RELEASE_NOTES: ${{ inputs.release-notes }}
+        run: |
+          : "${FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_JSON:?Configure the FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_JSON repository secret}"
+
+          credentials_file="$(mktemp "${RUNNER_TEMP}/firebase-app-distribution.XXXXXX.json")"
+          trap 'rm -f "${credentials_file}"' EXIT
+          printf '%s' "${FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_JSON}" > "${credentials_file}"
+          chmod 600 "${credentials_file}"
+
+          firebase_app_id="$(jq -er '.flavors.dev.firebase_app_id | strings | select(length > 0)' default.json)"
+          upload_args=(appdistribution:distribute "${APK_PATH}" "--app=${firebase_app_id}" "--release-notes=${RELEASE_NOTES}" "--non-interactive")
+          if [[ -n "${FIREBASE_APP_DISTRIBUTION_GROUPS}" ]]; then
+            upload_args+=("--groups=${FIREBASE_APP_DISTRIBUTION_GROUPS}")
+          fi
+          npx --yes firebase-tools@15.27.0 "${upload_args[@]}"
diff --git a/default.json b/default.json
index 93ca43be74a..c82d7228cb6 100644
--- a/default.json
+++ b/default.json
@@ -14,7 +14,7 @@
             "link_preview_enabled": true
         },
         "dev": {
-            "application_id": "com.waz.zclient.dev",
+            "application_id": "com.wire.android.dev",
             "developer_features_enabled": true,
             "logging_enabled": true,
             "application_is_private_build": true,
diff --git a/docs/adr/0014-firebase-app-distribution-for-dev-builds.md b/docs/adr/0014-firebase-app-distribution-for-dev-builds.md
new file mode 100644
index 00000000000..faeead17048
--- /dev/null
+++ b/docs/adr/0014-firebase-app-distribution-for-dev-builds.md
@@ -0,0 +1,34 @@
+# 14. Firebase App Distribution for Dev builds
+
+Date: 2026-08-20
+
+## Status
+
+Accepted
+
+## Context
+
+We need to distribute DevDebug APKs to testers without adding App Distribution uploads to the
+shared build workflow. Firebase App Distribution requires the APK package name to match the
+selected Firebase Android app.
+
+## Decision
+
+Use the Firebase CLI from the distribution workflow. CI writes
+`FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_JSON` to a temporary credentials file and passes it as
+Application Default Credentials. Local builds do not include App Distribution tooling or tasks.
+
+Use a manual `Distribute Dev Build` workflow for uploads. The workflow accepts a PR number to reuse
+the existing DevDebug artifact from its successful Develop PR build. Without a PR number, it builds
+DevDebug from the branch selected when the workflow is dispatched.
+
+Dev's base application ID is `com.wire.android.dev`, so DevDebug uses
+`com.wire.android.dev.debug`, matching the Firebase Android app used for distribution.
+
+## Consequences
+
+- App Distribution is opt-in and does not alter the shared build workflow.
+- The Dev package-ID change does not change `firebase_app_id`, `firebase_push_sender_id`, or the
+  Firebase project used for push notifications.
+- Existing `com.waz.zclient.dev.debug` installations do not update in place and should be treated
+  as ephemeral Dev installations.
diff --git a/tests/testsSupport/src/androidTest/kotlin/com/wire/android/tests/support/UiAutomatorSetup.kt b/tests/testsSupport/src/androidTest/kotlin/com/wire/android/tests/support/UiAutomatorSetup.kt
index 411d207c4f2..f180f10ab59 100644
--- a/tests/testsSupport/src/androidTest/kotlin/com/wire/android/tests/support/UiAutomatorSetup.kt
+++ b/tests/testsSupport/src/androidTest/kotlin/com/wire/android/tests/support/UiAutomatorSetup.kt
@@ -38,7 +38,7 @@ const val TIMEOUT_IN_MILLISECONDS = 20_000L
 
 object UiAutomatorSetup {
 
-    const val APP_DEV: String = "com.waz.zclient.dev.debug"
+    const val APP_DEV: String = "com.wire.android.dev.debug"
     const val APP_STAGING: String = "com.waz.zclient.dev"
     const val APP_BETA: String = "com.wire.android.internal"
     const val APP_PROD: String = "com.wire"