NY TIMES - Mar 10 - Grindr is approaching its fourth anniversary and has amassed ~5M users who spend ~90 minutes each day using the app. Billions of messages fly across the service every year, and 76% of the company’s revenue comes from money generated by Grindr premium users. Jamie Woo, author of the book, Meet Grindr, How One App Changed the Way We Connect, says Grindr’s main purpose is to facilitate hookups that are “spontaneous and intimate". He said the primary appeal of Grindr is its simplicity. The app also focuses on proximity rather than location.