After working in iPhone development for a couple months, it appears that the same level of data would be difficult to achieve in an iPhone app. Sure, iPhone looks very pretty and its multimedia capabilities are good. But a lot of things that make the lucid dreaming app possible, such as background services are missing from iPhone. For all intents and purposes, an iPhone is a single app system, there's very little support for background activity (hence the long battery life).

if there will be an iPhone app, it would surely cost around 6$ for the same level of sophistication (if that is possible). There are just too many obstacles to overcome and BS to deal with when developing an apple product