Can anyone help me figure out how to add the features found on either of the pages below? They have a quantity and add to cart on each page so the user can build their own box on one page. Is this custom code or an app?
Olivia here from the Shopify Team. Thanks for sharing your question.
I had a look at the links you shared and I definitely have some suggestions on how you can set up something similar. While I can't be 100% certain how these sites employed this feature, my experience tells me it's likely an app.
Here are some of our top picks:
There's more where those came from, so make sure to take advantage of free trials for the apps to find exactly what you need. I've personally used Bundle Builder in the past and really liked it, but each of these apps boast stellar reviews from real users.
Let me know what you think, and which one you end up going with.