A number of reasons: It's to guarantee a certain quality in the user base. Uses GPS to get general location and new iOS 5 face detection to guarantee 1 clear f

A number of reasons: It's to guarantee a certain quality in the user base. Uses GPS to get general location and new iOS 5 face detection to guarantee 1 clear face in the profile pic. So we shouldn't get people just showing their eyeball or a group photo were you don't know who you're liking. We're also native iOS developers. We're a two man band and have done everything in-house, iOS, Rails and Node development. We've done the promo video and composing of music in-house too. (Wife did the voiceover :)) All to minimise costs. The revenue from our other iOS apps will be subsidising server costs. If and when we launch on other platforms, we'll be native and use the APIs to guarantee a certain level of quality both in the App and in the user base. Generally speaking, depending on how much income we generate will determine expansion on other platforms. We'll have to react to demand.