The Android app was first spotted by sleuths at Android Police, and we managed to find a version for iOS as well. But the company hasn’t made a formal announcement yet. [Read: Facebook begins placing labels on posts by ‘state-controlled media’] The description on the Play Store and App Store, along with sign-in information on the app suggests this app will be limited to Dropbox’s paying customers. Information on both stores notes that the app is using zero-knowledge encryption — a type of encryption where you don’t have to reveal the password for verification. According to the info, the app can generate unique passwords for new sign-ups and autofill your credentials on apps and websites. We’ve asked Dropbox to provide more details on general availability and features, and we’ll update the story if we hear back.