Apps on Homer's smartphone: Worms With Friends, iRunes, Splinterest, Insta-Grandma, Grand Theft Walrus, Whimpr, Snub Hub, Quitter, Call of Daddy and Duff Countdown.
The title is a reference to the payment service of the same name.
The new neighbor they visit , introduces himself at the bake sale as Wilkes-Booth John. The name of the assassin who shot President Abraham Lincoln , John Wilkes-Booth therefore his name is either a reference to Lincoln's assassin or likely the same person but switched his names to avoid being recognized.
The song "Ear Posion" sings at the block party is "Till There Was You," from 'The Music Man' by Meredith Willson. It was also famously recorded on the Beatles' first album, the only song from a Broadway show the group ever covered.