Warehouse inventory IPad App

Need a basic warehouse inventory iOS app to track inventory in and out. Need multiple users and a couple of security levels, a warehouse manager that would be able to add inventory with pictures and barcodes, scan in and out. And employee level view inventory levels, pictures, and request product from warehouse manger. Will need multiple warehouses available in the future but probably only 1000 items. Will need to have it transferred it our Apple Development Account on completion. We also have our own servers for hosting, and are open for for suggestions on what database to use