Is this how it works? I have a web app that keeps inventory of your physical book collection (not really). My users would like to use their iPhone as a bar-cod

Is this how it works? I have a web app that keeps inventory of your physical book collection (not really). My users would like to use their iPhone as a bar-code scanner to add new books to their inventory. I don't want to create a native application so I decide to integrate with your app. My user installs your native app and then comes to my site to add a book and clicks a scan link. That scan link calls your native app to use the camera on the device to scan the bar-code, decode the image and send me back an ISBN. I'm not sure I would have taken the time to figure out that's how it works without seeing this on HN. "Go where your html form can’t." That makes sense to you and me now, but meant nothing to me when I first entered your website.