Shopify app upgrade in place

Hi Shopify Community,

I am working on a new Shopify app with a web pixel extension. The existing app is experiencing Liquid deprecation issues. There is no payment involved in the app. I would like to know how the app upgrade process works after releasing the new version.

  • Will clients be force upgraded?
  • Can they choose to stay on the existing app?
  • If they can stay on the old app, will they receive an upgrade notification?

Additionally, is it possible to test this process before the release?

Thank you all for your help!