They check Facebook, Twitter, text message, or other phone applications.
Grocers will offer phone applications that tell shoppers exactly where to go.
Indeed, the new phone applications seem to promise hours of unrelieved, humorless argument.
Others, like Santiago, 15, tell about phone applications that determine the color of clothes.
"They have phone applications stretched out, not tablet applications," Mr. Schiller says of Android apps.
If the phone applications freeze or give bad information, they will most likely frustrate consumers.
He said competition and transparency were the best solutions, and pointed to phone applications that allow consumers to compare prices, saying he had used one on Thursday himself.
"Today, Google Goggles is limited because it recognizes certain objects in certain categories," said Vic Gundotra, a vice president at Google in charge of its mobile phone applications.
Apple 's App Store sells mobile phone applications better than anyone else.
