NxtApp, iPhone/iPad Brain Gym today announces the winner of its iTunes Gift Card contest. NxtApp exercises the brain while having lots of fun with numbers. It’s a fun and addictive way to increase gamer’s IQ, strengthen his/her insight, focus the scanning skills, improve pattern recognition and refresh years of math lessons. It was featured by Apple in the “What’s Hot” section in the US and UK. The Washington Post describes NxtApp as the perfect app for mental math.