# 



In order to get the latest build number from App Store or TestFlight, you will need the App Store credentials as well as the **Application Apple ID**. This is an automatically generated ID assigned to your app and it can be found under **General > App Information > Apple ID** under your application in App Store Connect.

1. Add the **Application Apple ID** to the `codemagic.yaml` as a variable
2. Add the script to get the latest build number using `app-store-connect` and configure the new build number using `agvtool`.
3. Your `codemagic.yaml` will look like this:

```yaml

workflows:
  ios-workflow:
    name: iOS Workflow
    integrations:
      app_store_connect: <App Store Connect API key name>
    environment:
      vars:
        APP_STORE_APPLE_ID: 1555555551
    scripts:
      - name: Increment build number
        script: | 
          #!/bin/sh
          cd $CM_BUILD_DIR
          LATEST_BUILD_NUMBER=$(app-store-connect get-latest-app-store-build-number "$APP_STORE_APPLE_ID")
          agvtool new-version -all $(($LATEST_BUILD_NUMBER + 1))
      - name: Build ipa for distribution
      script: | 
        # build command

```