When would be the best time to send a notification to an App user?

Luis Von Ahn, co-founder of Duolingo, a language-learning app deployed an AI. The results were astounding!

The app should send a notification 24 hours after they used it last. 

Reason? 

If you were free yesterday and engaged with the app at 2:00 PM, there is a good chance that you are free today at 2:00 PM. 

He joked about it in his latest TED Talk. 

Just an instance where AI was used to replace common sense. 

#AI #Duolingo #tech #intelligence