Manic, sad, up, down. Your voice may reveal mood shifts. iStockphoto hide caption

toggle caption iStockphoto
Phone App Might Predict Manic Episodes In Bipolar Disorder
  • Download
  • <iframe src="https://www.npr.org/player/embed/317398820/317642094" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

After a tornado leveled Moore, Okla., last year, firefighter Shonn Neidel (left) developed an app that helps first responders locate storm shelters under the wreckage. Courtesy of Shonn Neidel hide caption

toggle caption Courtesy of Shonn Neidel
Storm Shelter App Helps Pinpoint People Amid Tornado's Rubble
  • Download
  • <iframe src="https://www.npr.org/player/embed/314235543/314607059" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

With tablet technology still relatively new, pediatricians are trying to understand how interactive media affects children. iStockphoto hide caption

toggle caption iStockphoto
Parenting In The Age Of Apps: Is That iPad Help Or Harm?
  • Download
  • <iframe src="https://www.npr.org/player/embed/290110766/290714374" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Matchmaking apps like Tinder can help people find potential dates quickly. Tinder hide caption

toggle caption Tinder
Mobile Match Apps Are 'Dating On Steroids'
  • Download
  • <iframe src="https://www.npr.org/player/embed/276617790/276782591" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

He's not checking your blood glucose levels. He's playing Words with Friends. Anna Zielinska/iStockphoto.com hide caption

toggle caption Anna Zielinska/iStockphoto.com

Popular online games like FarmVille use powerful reward systems to get players to spend real-world money on virtual items. Zynga/AP hide caption

toggle caption Zynga/AP
Online Marketers Take Note Of Brains Wired For Rewards
  • Download
  • <iframe src="https://www.npr.org/player/embed/204621796/205058141" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

How many calories in that bite? My Fitness Pal and other fitness and nutrition apps can help find the answer. Heather Rousseau/NPR hide caption

toggle caption Heather Rousseau/NPR
Patients Lead The Way As Medicine Grapples With Apps
  • Download
  • <iframe src="https://www.npr.org/player/embed/192777704/193194555" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Drinks columnist David Wondrich is seen on Esquire's new Talk to Esquire app, which allows users to interact with several of the magazine's columnists through voice recognition. Screengrab via YouTube hide caption

toggle caption Screengrab via YouTube
Speak Up! Advertisers Want You To Talk With New Apps
  • Download
  • <iframe src="https://www.npr.org/player/embed/177345718/177371308" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

University of Washington computer science student Laura McFarlane and her team work on their smartphone app aimed at helping girls being illegally trafficked get help. Sara Lerner/NPR hide caption

toggle caption Sara Lerner/NPR
More Than Just Angry Birds, Apps Can Have A Humanitarian Side Too
  • Download
  • <iframe src="https://www.npr.org/player/embed/175388230/175439205" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript