Randy Harvey, a “courier” for on-demand gas app Purple, delivers 10 gallons of gasoline to a San Diego customer last week. (Alejandro Tamayo / San Diego Union-Tribune) ...

Smartphone apps might be able to tell if you are at risk of depression, simply by collecting GPS and other data, according to a new study.

Based on smartphone data alone, Purple Robot successfully identified 87 percent of those that the PHQ-9 identified as being at risk. Depression affects 6.7 percent of Americans over the age of 18 ...

The app’s simple design and succinct explanations make it stand out from the pack. Online programming tutorials, such as many online courses, can often lack practical exercises or quality ...

At best, App Inventor will spark a torrent of creativity and, when we finally see Android-based pad-style computers, the result of simple programming with a compelling platform could be astounding.