The whole app is on your phone
All three of them can take a photo from a phone. What the phone is doing in those tools is being a camera pointed at a desktop workflow — the cards, the prices and the listings live somewhere else. In BinderTrax the app is the product: scan at a show, price a card in a shop, check what you are missing from a set while you are standing at a table, then open the same account at your desk when it is time to list. Kronozio's iPhone app reads graded slab labels and sends them to the Windows app. Card Dealer Pro and CardLuma have no phone app at all.