Do I need to install the app for every theme on my store?

No, the app is installed for all themes. However, please remember that you need to enable the app in your theme editor after installation following the next steps:

  1. Click 'Enable on theme editor' under the Application state section from the dashboard

  1. Once you are redirected to the theme editor, the app will be enabled by default. In this step you just need to review the app is enabled and then click 'Save' on the top bar

  1. Go back to the app's dashboard and click 'Refresh'

  1. In the Application state section you will see now the app is enabled

Bear in mind that in case of theme change you need to follow the exact same process in your new theme.