Please take a look at below 2 (two) demo, in that we have all requirements fulfilled. You can access this application through Tablets/Smartphones(iPad/iPhones) and obviously with any computer.
A Dentist Financial Projection System with Analytics( Graphs and Charts)
Username/Password: mi/mi
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A Order Management System, Maintains Purchase Orders, Items Inventory, Maintains Suppliers, Generate Purchase Orders in PDF format, Send Purchase Orders and many others.....
This is Order Management System, please look on Purchase Orders
Login for Purchase Order Manager with only Purchase Related Access, please look on Purchase Orders
Username/password : purchasemgr1/mi
Login for Order Management System Administration with all Access
Username/password : omadmin/mi
Looking forward to hear from you soon