Is “App” a Scrabble word?
Yes
APP
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of App
[ʔæʔp̚]
noun
1.An application (program), especially a small one designed for a mobile device.
2.Application (use, purpose; not a computer program)
3.Application (to a college etc.)