PokerStars is one of the most successful and profitable poker sites the industry has ever seen. Nobody has been able to rival their dominance for over a decade now. And no matter what you think of their new ownership, they continue to crush it in every possible way from a business point of view.
Poker apps provide the same security as desktop poker clients. Apps must still meet tight regulations from each jurisdiction's gaming commission. Poker apps also include geolocation software to make sure every player is within the state offering legal online poker.
PokerStars was originally a Costa Rican company, Rational Enterprises, part of Canadian company The Stars Group which was majority owned by the Canadian Scheinberg family. The company was subsequently moved to Onchan, Isle of Man.