iPlacard

iPlacard displays a short phrase using large letters on the screen. You can send a message to people who are at a relatively short distance. In a situation that you can't speak or make a noise, iPlacard will be useful.
You can save several favorite phrases.
In auto mode, a phrase is displayed as in an illuminated news display. In fix mode and 2 lines fix mode, large still letters are displayed, and additionally, you can make the screen blink.
To start / stop the display, touch the button on the screen. You can also start / stop display by rotating (turning over) the device.