Here are some tutorial and user guide in official website :http://sscan-doc.blogspot.tw SScan is a good app for stocktakingand inventory. It works not only with camera but also with hardwarebar-code scanner via usb otg adapter. Quick and fast, it collectsall bar-code or QR-code, and then you can make a file, share, sendor export the saved files everywhere can read csv format likeGoogle Drive, DropBox, Excel ...., etc. If you currently have a POSsystem and right now you need a tool for doing this, SScan is agood helper now. You don't have to build a tool like this againanymore.