Looking for a recommendation of a cross sell app that we can install on our store. The biggest requirement is having the ability to either add or pull through a custom line-item property, where the value of that property is a metafield we push through a custom app.
I've explored a few and yet to have any luck. Can anyone advise on something they know might work?
Regarding your concern, you could try some apps like LimeSpot Personalizer, Vitals, Wizer - these are the most loved upselling apps on Shopify App Store which enables us to create intelligent product recommendations and compatible with our app PageFly.
Above is my recommendations and hope you will find the best one for your store.
Best of luck!
Please let me know if it works by giving it a Like or marking it as a solution!