I can’t tell you much about the mobile app a team of Oakland Tech high school girls designed for the Technovation Challenge. It’s top secret.

It’s been described to me only as “a fashion organization app that will appeal beyond the typical demographic of 13- to 25-year-old females.” Which is encouraging, because I’m over 25 and could certainly use some technical support in the fashion organization department. My closet could, too.

Salina Wittmer, Carmen Zheng and Saleeha Bey will sell this idea Saturday at Google’s Mountain View headquarters. They’re up against teams from Mountain View, San Francisco, Los Angeles and New York — teams who, like them, took place in their regional competitions.

The Tech students spent nine weeks this spring learning design thinking, visual programming, communication, teamwork, and entrepreneurship in a series of workshops sponsored by Google. If they win first place at National Pitch Night Saturday, their app (for the Android platform) will be professionally developed and distributed.