A short tutorial on how to make invisible ink. Just like what spies used to use. Use this as inspiration for one of your April Fools Day pranks!
Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.
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