diff --git a/.github/actions/build-sample-app/action.yml b/.github/actions/build-sample-app/action.yml
new file mode 100644
index 000000000..d00e0da2d
--- /dev/null
+++ b/.github/actions/build-sample-app/action.yml
@@ -0,0 +1,124 @@
+name: Setup environment to build a sample app 
+description: Given all of the required inputs, this is a re-usable action that can build a sample app.
+
+inputs:
+  # If you want to save a new build, pass in this input. If you want to get the latest build, leave this input out.
+  apn-or-fcm:
+    description: 'Defines which push service to build the sample app for. Either "APN" or "FCM".'
+    type: string
+    required: true
+  sample-app:
+    description: 'The name of the sample app to build. Provide name of 1 of the directories in the Apps/ directory. Example: "CocoaPods-FCM"'
+    type: string
+    required: true
+  # The action we use to interact with Fastlane requires a JSON object for arguments, https://github.com/maierj/fastlane-action?tab=readme-ov-file#inputs
+  fastlane-build-args:
+    description: 'Arguments to pass to the Fastlane build command. Example: "{ "option1": "value1", "option2": "value2" }"'
+    type: string
+    required: false
+    default: '{}'
+  customerio-workspace-siteid:
+    description: 'The site ID for a workspace in Customer.io to set as default in compiled app, probably a secret.'
+    type: string
+    required: true 
+  customerio-workspace-cdp-api-key:
+    description: 'The CDP API key for a workspace in Customer.io to set as default in compiled app, probably a secret.'
+    type: string
+    required: true
+  GOOGLE_CLOUD_MATCH_READONLY_SERVICE_ACCOUNT_B64:
+    description: 'Set this input, only if you want to upload app for internal testing. Maps to the secret, GOOGLE_CLOUD_MATCH_READONLY_SERVICE_ACCOUNT_B64. See the Fastlane config files to learn more.'
+    type: string
+    required: false 
+    default: ''
+  FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_CREDS_B64:
+    description: 'Set this input, only if you want to upload app for internal testing. Maps to the secret, FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_CREDS_B64. See the Fastlane config files to learn more.'
+    type: string
+    required: false
+    default: ''
+
+outputs:
+  app-xcarchive-path:
+    description: 'The full relative path to the xcarchive for the built sample app. Example: "Apps/APN-UIKit/build/App.xcarchive"'
+    value: ${{ steps.set-action-outputs.outputs.apn-app-xcarchive-path }}
+  app-xcarchive-name:
+    description: 'The name of the xcarchive for the sample app build. Example: "App.xcarchive"'
+    value: ${{ steps.set-action-outputs.outputs.apn-app-xcarchive-name }}
+
+runs:
+  using: "composite"
+  steps:
+    - uses: ./.github/actions/setup-ios
+
+    - name: Install CLI tools used in CI script 
+      shell: bash
+      run: |
+        brew install sd # used in CI script as an easier to use sed CLI. Replaces text in files. 
+        brew install xcbeautify # used by fastlane for output 
+    
+    - name: Install tools from Gemfile (ruby language) used for building our apps with 
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '3.0'
+        bundler-cache: true # cache tools to make builds faster in future 
+    
+    - name: Setup build environment to prepare for building
+      shell: bash
+      run: |
+        make setup_sample_app app=${{ inputs.sample-app }}
+        sd CUSTOMERIO_WORKSPACE_SITE_ID ${{ inputs.customerio-workspace-siteid }} "Apps/${{ inputs.sample-app }}/BuildEnvironment.swift"
+        sd CUSTOMERIO_WORKSPACE_CDP_API_KEY ${{ inputs.customerio-workspace-cdp-api-key }} "Apps/${{ inputs.sample-app }}/BuildEnvironment.swift"
+
+    - name: Does ${{ inputs.sample-app }} use CocoaPods? 
+      id: check_podfile_exists
+      uses: andstor/file-existence-action@v3
+      with:
+        files: "Apps/${{ inputs.sample-app }}/Podfile"
+
+    - name: Cache CocoaPods downloaded dependencies for faster builds in the future 
+      if: steps.check_podfile_exists.outputs.files_exists == 'true'
+      uses: actions/cache@v4
+      with:
+        path: Apps/${{ inputs.sample-app }}/Pods
+        key: ${{ runner.os }}-${{ inputs.sample-app}}-Pods-${{ github.ref }}
+        restore-keys: |
+          ${{ runner.os }}-${{ inputs.sample-app}}-Pods
+
+    - name: Cache SPM downloaded dependencies for faster builds in the future 
+      if: steps.check_podfile_exists.outputs.files_exists == 'false'
+      uses: actions/cache@v4
+      with:
+        path: Apps/${{ inputs.sample-app }}/spm_packages
+        key: ${{ runner.os }}-${{ inputs.sample-app}}-SPMPackages-${{ github.ref }}
+        restore-keys: |
+          ${{ runner.os }}-${{ inputs.sample-app}}-SPMPackages
+
+    - name: Run pod install if using CocoaPods 
+      if: steps.check_podfile_exists.outputs.files_exists == 'true'
+      shell: bash
+      run: make install_cocoapods_dependencies app=${{ inputs.sample-app }}
+
+    - name: Dump GitHub Action metadata because Fastlane uses it. Viewing it here helps debug JSON parsing code in Firebase. 
+      shell: bash
+      run: cat $GITHUB_EVENT_PATH
+
+    - name: Build app via Fastlane 
+      uses: maierj/fastlane-action@v3.1.0
+      with:
+        lane: "ios build"
+        subdirectory: "Apps/${{ inputs.sample-app }}"
+        options: ${{ inputs.fastlane-build-args }}
+      env: 
+        GOOGLE_CLOUD_MATCH_READONLY_SERVICE_ACCOUNT_B64: ${{ inputs.GOOGLE_CLOUD_MATCH_READONLY_SERVICE_ACCOUNT_B64 }}
+        FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_CREDS_B64: ${{ inputs.FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_CREDS_B64 }}
+    
+    # xcodebuild creates builds that include a timestamp in the name. In order for bloaty to read the build, we need to rename it to a static name.
+    - name: Rename the same app build to a static name that we can generate SDK size reports with
+      shell: bash
+      run: mv Apps/${{ inputs.sample-app }}/build/*.xcarchive Apps/${{ inputs.sample-app }}/build/App.xcarchive 
+
+    - name: Set action output values
+      id: set-action-outputs
+      shell: bash
+      run: |
+        echo "app-xcarchive-path=$(echo Apps/${{ inputs.sample-app }}/build/App.xcarchive)" >> $GITHUB_OUTPUT
+        echo "app-xcarchive-name=$(echo App.xcarchive)" >> $GITHUB_OUTPUT
\ No newline at end of file
diff --git a/.github/actions/generate-sdk-size-report/action.yml b/.github/actions/generate-sdk-size-report/action.yml
index 14643c546..c3b796484 100644
--- a/.github/actions/generate-sdk-size-report/action.yml
+++ b/.github/actions/generate-sdk-size-report/action.yml
@@ -1,16 +1,6 @@
 name: Generate SDK size reports 
 # We only need to use 1 sample app build to generate the SDK size diff report. Therefore, we are hard-coding APN-UIKit into this action.
-description: Given a .xcarchive for the APN sample app, this action will generate all of the SDK size reports. 
-
-inputs:  
-  apn-app-xcarchive-name:
-    description: 'The name of the .xcarchive located inside of Apps/APN-UIKit/build/ to generate reports for. Example: "App.xcarchive"'
-    type: string
-    required: true    
-  generate-main-diff-report:
-    description: 'Whether to generate the SDK size diff report between the main branch and the PR branch. If you are running on a PR, set this to true'
-    type: boolean
-    required: true 
+description: Run this action to generate all of the SDK size reports. 
 
 # 3 separate SDK size reports may be generated by this action. 
 outputs:
@@ -21,24 +11,34 @@ outputs:
     description: 'The SDK size report, as a string. This report includes dependencies as well as the SDK size.'
     value: ${{ steps.sdk-size-including-dependencies-report.outputs.stdout }}
   sdk-size-diff-report:
-    description: 'The SDK size report, as a string. This report is the size difference between passed in app and the last build on main branch. Only populated if generate-main-diff-report input variable is true.'
+    description: 'The SDK size report, as a string. This report is the size difference between the current branch code and the last build on main branch. Only populated if this action is run from a pull request.'
     value: ${{ steps.sdk-size-diff-report.outputs.stdout }}
 
 runs:
   using: "composite"
   steps:
-  - name: Set environment variables for convenience in future steps 
-    shell: bash
-    # Use each of the set variables in future steps like: ${{ env.WORKING_DIRECTORY }}    
-    run: echo "WORKING_DIRECTORY=Apps/APN-UIKit/build" >> $GITHUB_ENV
-
   - name: Assert running on macOS runner. Bloaty requires some complex compilation to run on Linux. Therefore, this action only supports macOS runners.
     shell: bash
     run: test $RUNNER_OS = 'macOS'
 
-  - name: Install bloaty, in case it is not already 
-    shell: bash
-    run: brew install bloaty || true # If it's already installed, this will fail without error
+  - name: Make a build of the sample app to generate report for 
+    uses: ./.github/actions/build-sample-app
+    id: build-sample-app
+    with:
+      apn-or-fcm: 'APN'
+      sample-app: 'APN-UIKit'
+      # Pass in a hard-coded version and build number to ensure that all sample app builds that are compiled for SDK size reports are consistent.
+      # When we compare size reports between different builds, we want to ensure that the only difference is the SDK code that was modified in a PR. 
+      fastlane-build-args: '{"app_version": "1.0.0", "build_number": "1"}'
+      # workspace credentials do not matter since we are not using this app build. 
+      customerio-workspace-siteid: "12345"
+      customerio-workspace-cdp-api-key: "12345"      
+
+    - name: Save the sample app build, if this is a main branch build 
+      if: github.ref == 'refs/heads/main'   
+      uses: ./.github/actions/main-sample-app-build 
+      with:
+        apn-app-xcarchive-name: ${{ steps.build-sample-app.outputs.app-xcarchive-name }}
 
   - name: Make the SDK size report
     uses: mathiasvr/command-output@v2.0.0
@@ -46,8 +46,8 @@ runs:
     with:
       run: |
         bloaty --source-filter ".*(customerio-ios\/Sources).*" \
-          -d compileunits --debug-file=${{ env.WORKING_DIRECTORY }}/${{ inputs.apn-app-xcarchive-name }}/dSYMs/APN\ UIKit.app.dSYM/Contents/Resources/DWARF/APN\ UIKit \
-          ${{ env.WORKING_DIRECTORY }}/${{ inputs.apn-app-xcarchive-name }}/Products/Applications/APN\ UIKit.app/APN\ UIKit \
+          -d compileunits --debug-file=${{ steps.build-sample-app.outputs.app-xcarchive-path }}/dSYMs/APN\ UIKit.app.dSYM/Contents/Resources/DWARF/APN\ UIKit \
+          ${{ steps.build-sample-app.outputs.app-xcarchive-path }}/Products/Applications/APN\ UIKit.app/APN\ UIKit \
           -n 0 
     
   - name: Make the SDK size report, including dependencies
@@ -56,15 +56,15 @@ runs:
     with: 
       run: |
         bloaty --source-filter ".*(customerio-ios\/Sources)|(SourcePackages\/checkouts).*" \
-          -d compileunits --debug-file=${{ env.WORKING_DIRECTORY }}/${{ inputs.apn-app-xcarchive-name }}/dSYMs/APN\ UIKit.app.dSYM/Contents/Resources/DWARF/APN\ UIKit \
-          ${{ env.WORKING_DIRECTORY }}/${{ inputs.apn-app-xcarchive-name }}/Products/Applications/APN\ UIKit.app/APN\ UIKit \
+          -d compileunits --debug-file=${{ steps.build-sample-app.outputs.app-xcarchive-path }}/dSYMs/APN\ UIKit.app.dSYM/Contents/Resources/DWARF/APN\ UIKit \
+          ${{ steps.build-sample-app.outputs.app-xcarchive-path }}/Products/Applications/APN\ UIKit.app/APN\ UIKit \
           -n 0 
   
   # We want to determine if the SDK's binary size will change after merging a PR. 
   # To do that, we take the latest sample app build from the main branch and compare it to the app passed into this action. 
 
   - name: Download latest main sample app build to generate SDK size diff report       
-    if: ${{ inputs.generate-main-diff-report }} == true
+    if: ${{ github.event_name == 'pull_request' }}
     id: download-latest-main-build
     uses: ./.github/actions/main-sample-app-build
 
@@ -76,5 +76,5 @@ runs:
       run: |
         bloaty --source-filter ".*(customerio-ios\/Sources).*" -d compileunits \
           --debug-file="${{ steps.download-latest-main-build.outputs.apn-app-xcarchive-path }}/dSYMs/APN UIKit.app.dSYM/Contents/Resources/DWARF/APN UIKit" \
-          --debug-file="${{ env.WORKING_DIRECTORY }}/${{ inputs.apn-app-xcarchive-name }}/dSYMs/APN UIKit.app.dSYM/Contents/Resources/DWARF/APN UIKit" \
-          "${{ env.WORKING_DIRECTORY }}/${{ inputs.apn-app-xcarchive-name }}/Products/Applications/APN UIKit.app/APN UIKit" -- "${{ steps.download-latest-main-build.outputs.apn-app-xcarchive-path }}/Products/Applications/APN UIKit.app/APN UIKit" 
\ No newline at end of file
+          --debug-file="${{ steps.build-sample-app.outputs.app-xcarchive-path }}/dSYMs/APN UIKit.app.dSYM/Contents/Resources/DWARF/APN UIKit" \
+          "${{ steps.build-sample-app.outputs.app-xcarchive-path }}/Products/Applications/APN UIKit.app/APN UIKit" -- "${{ steps.download-latest-main-build.outputs.apn-app-xcarchive-path }}/Products/Applications/APN UIKit.app/APN UIKit" 
\ No newline at end of file
diff --git a/.github/workflows/build-sample-apps.yml b/.github/workflows/build-sample-apps.yml
index 59ed865de..1f1beabbe 100644
--- a/.github/workflows/build-sample-apps.yml
+++ b/.github/workflows/build-sample-apps.yml
@@ -66,82 +66,16 @@ jobs:
     name: Building app...${{ matrix.sample-app }}
     steps:
     - uses: actions/checkout@v4
-    - uses: ./.github/actions/setup-ios
 
-    - name: Install CLI tools used in CI script 
-      run: |
-        brew install sd # used in CI script as an easier to use sed CLI. Replaces text in files. 
-        brew install xcbeautify # used by fastlane for output 
-    
-    - name: Install tools from Gemfile (ruby language) used for building our apps with 
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: '3.0'
-        bundler-cache: true # cache tools to make builds faster in future 
-    
-    - name: Setup APN build environment to prepare for building
-      if: ${{ matrix.apn-or-fcm == 'APN' }}
-      run: |
-        make setup_sample_app app=${{ matrix.sample-app }}
-        sd CUSTOMERIO_WORKSPACE_SITE_ID ${{ secrets.CUSTOMERIO_APN_WORKSPACE_SITE_ID }} "Apps/${{ matrix.sample-app }}/BuildEnvironment.swift"
-        sd CUSTOMERIO_WORKSPACE_CDP_API_KEY ${{ secrets.CUSTOMERIO_APN_WORKSPACE_CDP_API_KEY }} "Apps/${{ matrix.sample-app }}/BuildEnvironment.swift"
-
-    - name: Setup FCM build environment to prepare for building
-      if: ${{ matrix.apn-or-fcm == 'FCM' }}
-      run: |
-        make setup_sample_app app=${{ matrix.sample-app }}
-        sd CUSTOMERIO_WORKSPACE_SITE_ID ${{ secrets.CUSTOMERIO_FCM_WORKSPACE_SITE_ID }} "Apps/${{ matrix.sample-app }}/BuildEnvironment.swift"
-        sd CUSTOMERIO_WORKSPACE_CDP_API_KEY ${{ secrets.CUSTOMERIO_FCM_WORKSPACE_CDP_API_KEY }} "Apps/${{ matrix.sample-app }}/BuildEnvironment.swift"
-
-    - name: Does ${{ matrix.sample-app }} use CocoaPods? 
-      id: check_podfile_exists
-      uses: andstor/file-existence-action@v3
-      with:
-        files: "Apps/${{ matrix.sample-app }}/Podfile"
-
-    - name: Cache CocoaPods downloaded dependencies for faster builds in the future 
-      if: steps.check_podfile_exists.outputs.files_exists == 'true'
-      uses: actions/cache@v4
+    - name: Build and upload app build for QA testing 
+      uses: ./.github/actions/build-sample-app
       with:
-        path: "Apps/${{ matrix.sample-app }}/Pods"
-        key: ${{ runner.os }}-${{ matrix.sample-app}}-Pods
-        restore-keys: |
-          ${{ runner.os }}-${{ matrix.sample-app}}-Pods
-
-    - name: Run pod install if using CocoaPods 
-      if: steps.check_podfile_exists.outputs.files_exists == 'true'
-      run: make install_cocoapods_dependencies app=CocoaPods-FCM
-
-    - name: Dump GitHub Action metadata because Fastlane uses it. Viewing it here helps debug JSON parsing code in Firebase. 
-      run: cat $GITHUB_EVENT_PATH
-
-    - name: Build app via Fastlane 
-      uses: maierj/fastlane-action@v3.1.0
-      with:
-        lane: "ios build"
-        subdirectory: "Apps/${{ matrix.sample-app }}"
-      env: 
+        apn-or-fcm: ${{ matrix.apn-or-fcm }}
+        sample-app: ${{ matrix.sample-app }}
+        customerio-workspace-siteid: ${{ secrets[format('CUSTOMERIO_{0}_WORKSPACE_SITE_ID', matrix.apn-or-fcm)] }}
+        customerio-workspace-cdp-api-key: ${{ secrets[format('CUSTOMERIO_{0}_WORKSPACE_CDP_API_KEY', matrix.apn-or-fcm)] }}
         GOOGLE_CLOUD_MATCH_READONLY_SERVICE_ACCOUNT_B64: ${{ secrets.GOOGLE_CLOUD_MATCH_READONLY_SERVICE_ACCOUNT_B64 }}
         FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_CREDS_B64: ${{ secrets.FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_CREDS_B64 }}
-    
-    # xcodebuild creates builds that include a timestamp in the name. In order for bloaty to read the build, we need to rename it to a static name.
-    - name: Rename the same app build to a static name that we can generate SDK size reports with
-      working-directory: Apps/${{ matrix.sample-app }}/build/
-      run: mv *.xcarchive App.xcarchive 
-
-    - name: Generate SDK size reports 
-      uses: ./.github/actions/generate-sdk-size-report      
-      if: ${{ matrix.sample-app == 'APN-UIKit' }}
-      id: generate-sdk-size-report
-      with:
-        apn-app-xcarchive-name: App.xcarchive
-        generate-main-diff-report: ${{ github.event_name == 'pull_request' }}
-  
-    - name: Save the sample app build, if this is a main branch build 
-      if: github.ref == 'refs/heads/main'   
-      uses: ./.github/actions/main-sample-app-build 
-      with:
-        apn-app-xcarchive-name: App.xcarchive
 
     - name: Update sample builds PR comment with build information 
       if: ${{ github.event_name == 'pull_request' }}
@@ -164,8 +98,17 @@ jobs:
           * ${{ matrix.sample-app }}: Build failed. See [CI job logs](https://github.com/${{github.repository}}/actions/runs/${{github.run_id}}) to determine the issue and try re-building. 
         edit-mode: append # append new line to the existing PR comment to build a list of all sample app builds. 
 
+  generate-sdk-size-reports:
+    runs-on: macos-14
+    name: Generate SDK size reports 
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: ./.github/actions/generate-sdk-size-report
+      id: generate-sdk-size-report
+    
     - name: Find existing SDK size report comment, if there is one. 
-      if: github.event_name == 'pull_request' && matrix.sample-app == 'APN-UIKit'
+      if: github.event_name == 'pull_request'
       uses: peter-evans/find-comment@v3
       id: find-sdk-size-report-comment
       with:
@@ -174,7 +117,7 @@ jobs:
         body-includes: <!-- sdk size reports -->
 
     - name: Send SDK size reports to the PR for convenient viewing 
-      if: github.event_name == 'pull_request' && matrix.sample-app == 'APN-UIKit'
+      if: github.event_name == 'pull_request'
       uses: peter-evans/create-or-update-comment@v4
       with:
         comment-id: ${{ steps.find-sdk-size-report-comment.outputs.comment-id }}
@@ -200,4 +143,4 @@ jobs:
           ${{ steps.generate-sdk-size-report.outputs.sdk-size-diff-report }}
           ```
           
-          </details>
+          </details>
\ No newline at end of file
diff --git a/Apps/.gitignore b/Apps/.gitignore
index 6aa3a4f98..bf70ac2ba 100644
--- a/Apps/.gitignore
+++ b/Apps/.gitignore
@@ -6,4 +6,5 @@ Pods/
 **/fastlane/report.xml
 **/fastlane/README.md
 BuildEnvironment.swift
-build/
\ No newline at end of file
+build/
+spm_packages/
\ No newline at end of file
diff --git a/Apps/fastlane/Fastfile b/Apps/fastlane/Fastfile
index 6f0143730..43b16e36a 100644
--- a/Apps/fastlane/Fastfile
+++ b/Apps/fastlane/Fastfile
@@ -33,11 +33,17 @@ end
 
 # Functions specific to iOS go in the platform block. 
 platform :ios do 
-  lane :build do
+  # Builds the iOS app and uploads compiled app for internal testing. 
+  # Build will only be uploaded if the environment variables for uploading are set.
+  #
+  # Usage: 
+  # `fastlane ios build` <-- if you want to generate a new build number and app version. Common to use for creating unique QA builds. Each build number is guaranteed to be unique.
+  # `fastlane ios build build_number:123 app_version:1.2.3` <-- if you want to specify the build number and app version.   
+  lane :build do |arguments|    
     download_ci_code_signing_files
     
-    new_app_version = get_new_app_version()
-    new_build_number = get_new_build_version()
+    new_build_number = arguments[:build_number] || get_new_build_version()
+    new_app_version = arguments[:app_version] || get_new_app_version()
     build_notes = get_build_notes()
     test_groups = get_build_test_groups()
 
@@ -70,22 +76,28 @@ platform :ios do
       export_method: "ad-hoc",
       configuration: "Release",
       xcodebuild_formatter: "xcbeautify",
-      build_path: "build" # Save derived data to Apps/X/build folder. CI will parse this folder later for tracking SDK size. 
+      build_path: "build", # Save derived data to Apps/X/build folder. CI will parse this folder later for tracking SDK size. 
+      cloned_source_packages_path: "spm_packages", # Save SPM dependencies to Apps/X/spm_packages folder. We can cache this folder to speed up builds on CI. 
     )
 
-    # function 'setup_google_bucket_access' is a re-usable function inside of apple-code-signing Fastfile that we imported. 
-    # This allows you to create a temporary file from a GitHub secret for added convenience. 
-    # When uploading the build to Firebase App Distribution, the CI server needs to authenticate with Firebase. This is done with a 
-    # Google Cloud Service Account json creds file. The base64 encoded value of this service account file is stored as this secret.  
-    service_credentials_file_path = setup_google_bucket_access(
-      environment_variable_key: "FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_CREDS_B64"
-    )
-    
-    firebase_app_distribution(
-      service_credentials_file: service_credentials_file_path,
-      groups: test_groups,
-      release_notes: build_notes
-    )
+    are_environment_variables_set_for_build_uploading = ENV["GOOGLE_CLOUD_MATCH_READONLY_SERVICE_ACCOUNT_B64"] && ENV["FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_CREDS_B64"]
+    if !are_environment_variables_set_for_build_uploading
+      UI.important("Environment variables required for uploading QA builds are not set. Therefore, not uploading build to Firebase App Distribution.")
+    else 
+      # function 'setup_google_bucket_access' is a re-usable function inside of apple-code-signing Fastfile that we imported. 
+      # This allows you to create a temporary file from a GitHub secret for added convenience. 
+      # When uploading the build to Firebase App Distribution, the CI server needs to authenticate with Firebase. This is done with a 
+      # Google Cloud Service Account json creds file. The base64 encoded value of this service account file is stored as this secret.  
+      service_credentials_file_path = setup_google_bucket_access(
+        environment_variable_key: "FIREBASE_APP_DISTRIBUTION_SERVICE_ACCOUNT_CREDS_B64"
+      )
+      
+      firebase_app_distribution(
+        service_credentials_file: service_credentials_file_path,
+        groups: test_groups,
+        release_notes: build_notes
+      )
+    end 
   end
 
   lane :update_ios_app_versions do |arguments|