Don't Forget to Tap UNO.
If you're willing to spring for the $7.99 it takes to get the application, you'll find the offering to be impressively developed, with flashy game play and all the nuances of the actual contest - from forcing you to "say UNO" when you're down to one card, to giving players the option to challenge Draw Four cards, if you believe they still have cards in their hand of the color being played.
Uh-Oh... A Draw Four!
Over the last 25 years or so, I've "progressed" from holding three cards in my hand to seven and now just one hand needs to prop up one iPhone, where I can push game play with my finger using Apple's touchscreen-enabled mobile device.
Rules are Rules, On the iPhone Or Anywhere
The standard UNO play can be done from anywhere between 2 and 4 players, and cards are scored just as they were from the original bright red package. Number cards are worth their face value, Draw Two, Reverse and Skip are worth 20 points a piece, and the Wild cards are a plump 50 points if you get stuck holding them in your hand by the time your opponent finishes play.
The game also offers features the original offering didn't - from playing songs on your iTunes library, to online multiplayer gaming, and alternate rules. If you're not above paying eight bucks for a card game, UNO is a great addition to your iPhone app library. You can find it on the App Store here.