*****
Note: This app teaches something challenging: how to calculate/estimate odds in your head instead of just memorizing many cases. However, you need to be pretty good at doing basic math operations with percentages in your head and counting outs.

We also suggest our app "Hold'em Odds Quizzer" which quizzes you on many common situations. Our Quizzer and Teacher apps complement each other well.
*****

Don't just memorize the odds, *understand* them ... This app teaches you a general method for estimating the odds for just about any Texas Hold'em scenario in your head in real time - on the fly in the middle of a live hand.

*****
"... helps players learn some of the math behind poker ... teaches a general method of estimating odds for different Texas Hold'em situations."
-- PokerSoftware.com

"Although there are a ton of poker iPhone applications available in the iTunes store, none are focused on actually making the user a better poker player.  Enter applications developed by PokerCruncher ..."
-- PokerSoftware.com

Many more great reviews on our TwoPlusTwo forum thread.
(See our website for links.)
*****

*****
V.1.7 - Explain "outs" further as suggested by iTunes reviews.
...
V.1.5 - Improve the usability of the sliders as suggested by iTunes reviews.
...
V.1.1 - About 10 more practice scenarios, as suggested by iTunes reviews.

Note though that this app is about learning general odds methods/rules, not memorizing many specific situations.
*****

Poker trainers, odds tables, etc. are useful tools but do they help you learn why the odds are what they are or are you just memorizing specific situations? And you can't use these tools or odds calculators in the middle of a live hand (would you really want to?; could be a "FISH" tell :)). This app takes a new and different approach to poker odds - understanding instead of memorizing, so you can handle any situation that comes your way.

Our odds estimation method is a pretty simple 3-step procedure. First you count your outs and estimate your odds of improving (using for example the "Rule of 4 & 2"; this app shows you how). Then you consider your opponent's counter-outs, then put the two together to come up with a good odds estimate.

We've provided about 20 common and important pre-flop and post-flop scenarios for you to practice the method on. This app will take you through the 3 steps for each practice scenario, one screen per step, and will make sure that you're on track towards a good odds estimate each step of the way, correcting you if needed. We've provided info/help buttons for each sub-step.

You might be thinking, how can you cover a game as complex as Texas Hold'em in 20 scenarios? Well, we agree, you can't! But this app is about learning a general method not many specific situations, and we picked these 20 scenarios to cover a good cross section of common and important pre-flop and post-flop situations. We feel if you understand how to compute the odds for say one generic TopPair vs TopPairTopKicker scenario or one representative Pair vs LowerPair pre-flop scenario, you'll be able to apply your knowledge to other similar situations easily.

Now, we're not saying that you're going to master this in 5 or 10 minutes. You're going to have to practice the method more than a few times, think about the outs and counter-outs, and do simple math operations in your head - just basic +, -, *, /; let's not let our math teachers down :). We hope you feel that acquiring this odds skill and knowledge is more than worth the learning/practice time.

App Store reviews are greatly appreciated, thank you.