3 ms·

Don't apps like Snapchat notify the other person if you take a screenshot of your messages?

• Petersipoi 3mo ago
  Yes, Snapchat does this. Apps absolutely have the ability to know when a screenshot is taken.
  • thaumasiotes 3mo ago
    Snapchat advertises that they detect screenshots. They try. But they're well aware that they can't actually know. For example, their bug bounty program policy helpfully informs you that "screenshot detection avoidance" is not considered a vulnerability: https://hackerone.com/snapchat https://hackerone.com/snapchat . That's because it's always possible.
• woadwarrior01 3mo ago
  Yes, iOS has userDidTakeScreenshotNotification for that. https://developer.apple.com/documentation/uikit/uiapplication/userdidtakescreenshotnotification https://developer.apple.com/documentation/uikit/uiapplicatio...
  • retired 3mo ago
    Would be nice if the user could disable that.
    • mylies43 3mo ago
      I think at least in snap it makes sense, the communications are suppose to be ethereal and disappear after reading, I like to know when someone screenshots something and its no longer ethereal
      • woadwarrior01 3mo ago
        There's an unspecified short/random delay between the user taking the screenshot and the notification firing. The trick used by Bluesky, Telegram etc is using a different technique. They (mis)use secure input fields to show an overlay when the user takes a screenshot.