I know this was previously not possible (2 years ago) but is it still the case? Can two POS apps on the same network share a cash drawer, and by implication, the register I suppose.
Alexis here from Shopify Support!
I'm afraid that it is not possible to have two iPads share a cash drawer at this time. We currently can only support one iPad per register. I can definitely see the benefit to having the ability to share the cash drawer though! I'll speak to my developers about it and see if we could release compatibility for this at some point in the future.
I can't make any promises, but I'll see what I can do!
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Alexis | Shopify Guru