Tried this app for about 5 minutes, and I didn't like it in the slightest. It doesn't teach you anything. It just puts everything in charts, gives you the running and true count, and tells you when you make a mistake. That's it. It doesn't tell you anything you need to know. YOU have to go do the work yourself. You don't get anything or anyone telling you how to calculate the running and true counts, or basic strategy, WHILE you are in the drill. DON'T WASTE YOUR TIME OR MONEY!