On April 15, 2011, the U.S. Attorney's Office for the Southern District of New York seized and ❤️ shut down Pokerstars and several of its competitors' sites, alleging that the sites were violating federal bank fraud and money ❤️ laundering laws.
Since PokerTracker software doesn't ❤️ fit into either of these categories it is generally allowed on most sites, including industry leader PokerStars.