CNNMoney: A white-hot new app for instant messaging, Jott has nearly 500,000 monthly users and 1 million app installs after just three months on the market. You might think there’s no need for yet another messaging app. But, Jared Allgood, CEO and co-founder of Jott, said 31% of U.S. teens don’t have text messaging abilities at school. His solution: Jott. The app’s AirChat feature allows users to send data and texts without a connection to the Internet. Jott uses Bluetooth and Wi-Fi radios to create a closed network with other devices that are within 100-feet of each other.