THE GUARDIAN - Jan 17 - Tinder is the heterosexual version of Grindr or the modern blend of Hot Or Not. ~450M profiles are rated every day and membership is growing by 15% each week. Tinder is addictive. The average user is on it 11 minutes per day. With Tinder, the pretext is to hook-up, but the real pleasure is derived from the Tindering process.