Quiz apps are the latest mobile craze

The newly launched Lies app. Screenshot from

Once known as "Facebook's youngest employee," 21-year-old Michael Sayman, who recently joined rival Google, yesterday released a new mobile trivia app called Lies.

Why it matters: Lies is the latest in a recent trend of question-based mobile social apps to quickly rise in popularity. Just last month, Facebook acquired a similar app, tbh, while two of Vine's co-founders say they found recent success with trivia game show app HQ.