Does anyone know if there is an app that allows you to bundle products to offer at a discount that also allows you to customize the product. Example: On product page you can include a text field for personalized engraving and on the product page to display another product to bundle at a discount.
Does this exist?
It sounds like you are asking for two things.
1) Custom fields entered by customer (ie engraving)
2) Bundling products together for a discount
You not not need 1 app to solve both problems. Regardless, I'm an experienced app developer looking for a new project to undertake. Shoot me an email over email@example.com and I'd be down to discuss this in depth with you.
I find this list of product bundle apps for Shopify on Avada. Hope it helps!