In first place, API???? What the hell is that? No kid, POS/ERPs don't know what a true API is. Is direct access to the DB, plan text files, and a lot of hyper-pain talking directly to the developers of that systems. And good look doing data archeology of all of that.
Because this I'm also building a POS for the iOS (in late stage, but is hard to do this solo). One of the innovations it have? The customer table is called: drum-drum-drum "Customer". Seriously, after dozens of integrations mine is the only one that the tables have names that make sense. And the fields. And the data type of that fields (cough a database have a datetime field? cough).
I have a iOS app that integrate with several ERPs/POS (http://elmalabarista.com/bestseller) that is used in my country.
In first place, API???? What the hell is that? No kid, POS/ERPs don't know what a true API is. Is direct access to the DB, plan text files, and a lot of hyper-pain talking directly to the developers of that systems. And good look doing data archeology of all of that.
Because this I'm also building a POS for the iOS (in late stage, but is hard to do this solo). One of the innovations it have? The customer table is called: drum-drum-drum "Customer". Seriously, after dozens of integrations mine is the only one that the tables have names that make sense. And the fields. And the data type of that fields (cough a database have a datetime field? cough).