Real estate search and marketing site Trulia today released a free mobile application for the Apple iPhone focused on rentals, adding to the site's collection of property search apps.

Trulia Rentals for iPhone, which is also compatible with Apple's iPod Touch, notifies users when new rental listings matching saved criteria come on the market in their area and displays listings with color-coded markers that indicate how long a listing has been on the market.

Green denotes a listing added in the previous 24 hours, gray indicates a listing that has already been