Bluesky's Sneaky Logo Trick: How It Hides Its Brand in Screenshots
Bluesky draws its logo on screenshots
Bluesky's iOS app cleverly hides its logo in the UI, only revealing it when users take screenshots. The trick involves a UITextField with secure text entry, which iOS blanks out during screenshots, allowing the logo to appear. The author discovered this by examining the app's open-source code and found similar implementations in Telegram and Signal. The technique is a nifty abuse of privacy APIs, though not universally loved by developers.
When I take the screenshot, iOS hides this UITextField by blanking the layer, allowing the Bluesky logo to flutter its wings through (it was here the whooole time).