Christine Porter is hooked on the MyFitnessPal app. In October, after deciding to lose 50 pounds, Porter started typing in everything she eats, drinks and any exercise she gets.
"This is my main page here," says Porter. "It's telling me I have about 1,200 calories remaining for the day. When I want to record something I just click the 'add to diary' button. I'm on it all day either through my phone or through the computer."
If you're trying to grow a business in Nigeria and you want investors, you want Nigeria's economy to look as big as possible.
Bayo Puddicombe and Zubair Abubakar own a company called Pledge 51, which creates applications for Nigeria's low-tech cellphones. One of their most popular games lets players pretend to drive the notoriously wild buses crisscrossing the Nigerian city Lagos. It's called Danfo, after the buses.