This app uses the flasher on the iPhone to send messages in morse code. It can also detect flashes being sent from other iPhones using its camera, and converts them to text, live. It can read messages over 1,500 ft away at night.
Don't wait to download this app, because you might need it when you no longer have service to download it.
The last letter of the message wouldn't appear, it does now. And the current letter being sent appears on the user's device.