“If I Had a Dollar” is a series that highlights one useful or entertaining app per week that costs less than $1. Skip your vending machine soda and try some new apps!

The holidays are an important time for a smartphone: Either you’re just about to get a new one, you know someone that will, or you’re using the one you already have to whisk you away to a land far far away from your raucous family.

Whether you’re interested in helping smartphone newbies take advantage of their new devices or eager to get your game on with a friend, it’s hard to ignore QuizUp — the uber-popular iOS(s aapl) quiz game that’s likely to be the next Candy Crush Saga.

QuizUp is a head-to-head quiz challenge that is played in real time, either with a friend or one of the game’s 4 million users. Quiz topics are…