Cons: The lengthy survey you must complete before you sign up.It is 100s of questions long and asks many probing questions about religion and moral views.

e Harmony is another massive player, with 3 million users signed up.

But size isn’t everything – as anyone who has just wrapped up a three-hour swiping session on Tinder will attest.

Some find this a barrier to join, fans say it weeds out the casual chancer from those truly looking for love – and means you don’t have to wait to broach tricky topics.

Pricier – it’s £44.95 for a month, but that drops to £12.95 per month if you sign up for a year.

The price and process mean only the dedicated remain – but equally, can lead to people dropping out mid-process.

Controversy swirled in 2010 around its lack of same-sex matching resulting in a site launched later for gay and bisexual daters called Compatible Partners, but e Harmony now offers matching for both mixed and same sex couples from the main homepage.Pros: Free to join and to have limited contact with members.You can connect with Facebook so getting started is much quicker than with other sites.A one step Facebook log-in process leads on to a few simple questions (the most obvious – height, kids, whether you drink or smoke), a description and a photo – then you are in. To use the site fully – sending unlimited messages to other members – payment is required.You can browse a selection of pictures and ages before logging in, anything more specific requires you to become a member. As with many free or low-cost sites, ads can be frequent and feel spammy.When she reduced her height to 5ft 9in, that rocketed to almost 2,000.