Market research firm comScore on Tuesday released results of its latest research into smartphone market share in the United States. The results showed that Apple is leading and growing faster than its competition, including Samsung.

During the three months ending April 2013, Apple held 39.2% of the U.S. market, up 1.4 points from the 37.8% it held in January 2013. For April, Samsung has 22.0% market share, up only 0.6 points from the 21.4% it held in January.

HTC (8.9%), Motorola (8.3%) and LG (6.7%) round out the top five. All three were down slightly in the April report.

Android leads the platform race for the April report with 52.0% of the U.S. share, but that’s down -0.3 points from the 52.3% it held in January.

Apple’s iOS, on the other hand, is up 1.4 points to 39.2% in the April report. iOS had 37.8% in the January report.

BlackBerry (5.1%), Microsoft (3.0%) and Symbian (0.5%) round out the top five. None of these companies grew market share.