For that specific device, yes it has it’s own apps to assist with barcode scanning, any other inputs (like CRLF), and symbologies to use. (Dataman quick setup, Scanner, and MX Keyboard wedge in the app/play store.)
As you can see on the Cognex site, it can either be used in a sled that uses the internal cameras, or in connection to the sled (MX-1502 with ER lensing shown) that will allow a more traditional “scan gun” user experience, and the device connection method shown on the Cognex site (Adaptable as per device).
I was able to get it to run/scan with the old mobile module with a few hiccups. But the database interface was on the gateway, and I tried to keep the client as thin as possible.
I know that it can use either iOS devices or Android (Which I thought was perfect for Ignition usage). I am using an iPod Touch 6th gen running iOS 12.1.
I also have not explored the Cognex SDK much …yet… as the Ignition mobile module was somewhat functional and hoping that the Perspective module will completely replace it. My understanding is though that if we needed a more native interface, yes the Cognex SDK would be the way to go.