Sending hidden messages on an iPhone can be a fun and effective way to communicate privately with others. There are a few different ways to do this, including using invisible ink, code, or even sending a message within an image.
One of the simplest ways to send a hidden message on an iPhone is to use invisible ink. This can be done by writing a message in a light color, such as white or yellow, on a piece of paper. The message will then be invisible to the naked eye, but it can be revealed by shining a black light on it.
