a nifty
Something that is efficient or easy to use or is very stylish, cool, or looks good. If it doesn’t look good, it’s not nifty. Period.
This new phone is nifty. If it doesn’t look good, it’s not nifty. Period.
That new outfit is nifty. It’s like a fashion show in one piece.
That new app is nifty. It’s efficient, easy, and looks good.