Display given text using whole screen area
● show billing information to the seller
● expose pick-up signboard at the airport
● ask for help in unknown language
● and exclusively for the waterproof devices: "help I can't swim" ;-)

Very simple control
● single tap - swap colors
● double tap - quick exit
● long touch - edit content

Can be used as widget
● each widget carries its own message
● widget's image shows the text

Can accept requests from other applications e.g. "Google Translate"
● enter text in your language choose target language
● activate translation result with single touch
● open menu by button located close to the result
● choose "Share" and select "Signboard"

If you're programmer call Signboard from your application with Intent
● acton: SEND
● MIME type: text/plain

Last but not least this application
● is very small and economically uses system resources
● does not require any permissions
● is ad-free