Education quiz app Kahoot says it’s now used by 50% of all US K-12 students, 70M users overall Ingrid Lunden 6:48 AM PST · January 18, 2018 ...

But a quiz app isn't much fun unless you can show off what you know. When you complete a quiz, you're given a score on each quiz based on how many questions were answered correctly.

There's a huge number of apps and services that promise to help you find love. But there are about a handful of apps specifically designed for people who have already found love. Happy Couples is ...