DoubleIP S.A., announces that DoubleCheck 1.0 for iPhone application reached No. 1 Top Paid & Grossing utilities charts in the Greek AppStore. DoubleCheck enables users to check the current mobile operator of their contacts and provides a simple one step mechanism to mark this info on their address book, and have it always available when they place or receive a call. In addition, DoubleCheck reached No. 6 Top Paid main chart position in the entire Greek AppStore.