I love the variety of drills, the instant feedback, and the authentic sounds that make it a fun app to use. I am using 94Fifty with my iPhone 6 Plus, enjoying the new video tutorials, too. I accidentally did well with my strong hand on a weak hand drill, and I wish I had the ability to reset the stat for that particular drill. Unexpected screen zoom, and lockup until sleep and restart has taken place a couple of times, even outside the app - hopefully it is something minor. I will rewrite this paragraph if I can be certain the 94Fifty app is associated with the issue, otherwise it makes an interesting workout.