Interesting, in the past I worked on a music discovery tool with a similar interface.<p>I'm not sure this actually works in the app space though. I think what you're showing is apps similar to a starting point. But do I want more apps that are similar to the apps I already like? Or do I want a new app to do something that I don't already have a solution for? I suspect the latter is more important, possibly with the exception of games.<p>Nice work on the interface though. I think you could find another use for it. Maybe by showing a people who have app x also have app y may be a better model to go with rather than app similarity.
Is this really how people do app discovery though? It seems like this is solving a pretty niche case, of "I know what I want, but I want a knock-off version of it"<p>One of my biggest challenges in the App Store (vs. the Play Market) is the ability to find an app based on what I need, compatible with the version of software I have on my device. For example: I defy you to try and find a stereo recorder app that is compatible with first-gen iPodTouch (abandoned to iOS v3.1.3). For that, there's no better option than a well-formed Google search.<p>Popping out the similar apps feels like it would be useful in a few categories (games, maybe one or two others), but isn't really going to help you find that new app you need, just help you in situations where you'd have multiple apps to fulfill the same need.
The Pandora default doesn't show Rdio, LastFM or SoundCloud, so I was expecting them to show up similar to Spotify, but it went even further away from online radio into "free MP3" apps. It also isn't obvious that you can continue to click on the app icon to get more "similars".<p>Likewise, inputting Instagram didn't bring up any of their direct competitors.<p>It looks like it's filtering more by popularity based on price than similarity, which is why all of these freebie crapapps I've never heard of are showing up instead of solid alternatives.