According to The Las Vegas Review Journal, the Nevada Gaming Control Board has warned Las Vegas casinos to look out for iPhones or iPods running the card-counting app Blackjack Card Counter by Poulet Maison.

Downloadable from Apple's App Store, the program keeps track of the "true count" and the iPhone or iPod vibrates when it reaches the count you specify.

The iPhone app has a stealth mode to turn off the display while counting. Although the app usually costs $4.99, for a limited time Apple was selling it for $1.99.

Using a device to help you count the cards violates the Nevada Revised Statutes law NRS 465.075.

The law reads as follows:

NRS 465.075 Use of device for calculating probabilities. It is unlawful for any person at a licensed gaming establishment to use, or possess with the intent to use, any device to assist:

1. In projecting the outcome of the game;
2. In keeping track of the cards played;
3. In analyzing the probability of the occurrence of an event relating to the game; or
4. In analyzing the strategy for playing or betting to be used in the game, except as permitted by the Commission.

According to Nevada state law, felony charges can ensue if device-assisted card counters are caught, resulting in a prison term of one to six years or a fine of up to $10,000, or both.