Trying to find options for an offline, preferably open source pos system or invoice generator of some kind. We have 3 stores and are scaling quickly, we already have an incredible deal through our payment processor so I’m not looking to get away from them. Really just need an app or something that makes inputting customer orders brain dead easy. Sales people just need to click on a few products, they see the total, punch it into the tablet and run the credit card on the machine and then at the end of each week I’d like to be able to have an itemized list of everything that needs ordered. We’re currently writing all the invoices by hand and saving them in Google drive and the margin for error is just too high. Any recommendations would be appreciated.