+6% to retention in 20 minutes (super easy)

The VP of Growth at language education platform Duolingo, shared her favorite A/B test.
This test led to a 6% increase in retention. And it took them just 20 minutes to apply it.

Here’s what they did.

They added a little red dot on their app icon that indicates there’s something new, or something unresolved.

It was just 6 lines of code created in 20 minutes.