You browse photos and if you're interested, you swipe right - if you're not, you swipe left.
It takes minutes to set up a profile and the app requires you to have a Facebook account. Once enabled, you can write a concise 500-character bio and add up to six images, which can be imported from your Facebook profile or your phone's camera roll.
Search settings allow you to set your preferences for distance and age range.
Women only become visible when they swipe right on a man, then he gets a notification and can choose to swipe right or left.
This guarantees genuine matches by preventing men from liking every profile to 'play a numbers game' – which research suggests as many as a third do.