Chumie app for iPhone and iPad
This app provides a easy/fast/free way to find a right room for college students.
The app saves your search criteria for on-going search even if you are not online, and notify you when there are new target listings. (You do need to worry about missing target listings)
The app shows potential roommates profile, you can see their lifestyles.
The app makes copies of your uploaded listings to other local hot renting sites to improve exposure.