Not sure if you're good to drive? Try navigating the games in this new smartphone app before testing your skills on the open road.

The federally funded ENDUI (said "End DUI") app was announced Thursday by officials in Maryland; while New York, New Mexico, Colorado, California and other states have similar apps, Maryland's stands as the most detailed, the Associated Press reported.

Available for Android and iPhone, the app gets information from users to estimate their blood-alcohol level, asking for sex, height, weight and number of drinks.

Funded by the Governors Highway Safety Association, the new app was developed by the Maryland Highway Safety Office for about $50,000. 

In one of the games, users can virtually test their driving skills by pressing a red button to "brake" when the interactive game shows a pedestrian walking or a car stopping ahead. The ENDUI app will then detail the user's reaction time along with how quickly a real-life car would have had to stop to avoid crashing into the person or vehicle.

"The game is meant to be a hook and pull you in," Tom Gianni, chief of the Maryland Highway Safety Office, told the AP. "Then it's meant to give you a lesson of, 'See what can happen. Imagine if you were behind the wheel.'"

What if you can't navigate the app's games so well? ENDUI can tap GPS technology to get you a cab or find designated driver possibilities with preloaded phone numbers.

"It kind of takes the guesswork out of a situation where you've had a few drinks and you're not sure what to," Gianni said.

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