With Dazzle, Marissa Mayer bets your camera roll has more info on your life than your inbox

Marissa Mayer's new app Dazzle analyzes all photos on a user's phone to infer hobbies, interests, food preferences, style, and social connections. Mayer argues a camera roll holds more personal data than an inbox. The app claims to build a comprehensive lifestyle profile from visual content, positioning photos as the richest source of personal insight.