We use it on an ipad when out camping or in the backyard or even inside during the winter. We play the original game and the app does everything that we need and when you have an impressive game you can send a copy to your family or friends! We love this app.
One and two pair does not exist in Yahtzee. It does not display the points for each hand so you must know them off of the top of your head or look them up. Also when I tried to put in the points for a large straight (40, I looked it up) it kept trying to change it to 20. Overall a pretty crappy app. I've never left a review for an app before, even ones I did not like, so let that show just how disappointed I was in what could have been a pretty cool app.
I love having a digital scorecard. It is convenient and works well. The scorecard has gone blank if I go to another app and come back. Not great in the middle of the game. If that can be fixed, then it's a 5 star app.