diff --git a/README.md b/README.md
index 7392c4e..16c7e1d 100644
--- a/README.md
+++ b/README.md
@@ -194,6 +194,12 @@ There are a lot of options available that define how to build your app, for exam
 snapshot --scheme "UITests" --configuration "Release"  --sdk "iphonesimulator"
 ``` 
 
+Reinstall the app before running `snapshot`
+
+```sh
+snapshot --reinstall_app --app_identifier "tools.fastlane.app"
+```
+
 For a list for all available options run
 
 ```sh
diff --git a/lib/snapshot/options.rb b/lib/snapshot/options.rb
index 92c5758..a6c7fb4 100644
--- a/lib/snapshot/options.rb
+++ b/lib/snapshot/options.rb
@@ -85,6 +85,7 @@ def self.available_options
                                      is_string: false),
         FastlaneCore::ConfigItem.new(key: :app_identifier,
                                      env_name: 'SNAPSHOT_APP_IDENTIFIER',
+                                     short_option: "-a",
                                      description: "The bundle identifier of the app to uninstall (only needed when enabling reinstall_app)",
                                      default_value: ENV["SNAPSHOT_APP_IDENTITIFER"] || CredentialsManager::AppfileConfig.try_fetch_value(:app_identifier)),