It costs $29 a month with no limitations. 14 days free trial. The subscription is charged and handled by Shopify and will be visible on your Shopify bill.
Pro level with Dashboard is $39 a month.
Premium level with Dashboard and extra functionality is $59 a month.
Read more about Dashboard here.
You only need your Shopify store and a standard barcode scanner. iPacky runs integrated in Shopify admin in your browser.
The barcode scanner must be set up to emulate keystrokes with a return at end. This is the default setting for most barcode scanners. You can test this in a program that accepts keyboard input. For example Word or a web page. After a scan of a barcode it show should show the contents of the barcode, and a return (line feed) at end. There is no setup of the barcode scanner in iPacky. Look up the manual for your barcode scanner if any problems.
No. It's very simple to use, and needs no configuration to use. There are settings that you can change, but it's not mandatory.