Tinder has a very young skew, with 50 per cent of users aged 18-24, 34 per cent aged 25-35 and only eight per cent aged 35-44.
It also has a reputation for being more of a 'hook-up' app than one for dating, although it has been used as both with some success, by all accounts.
Most members are reported to be in their 20s and 30s, although e Harmony also caters to a 'large number' of older users.
Its approach is quite different to RSVP's however, requiring you to fill out a detailed questionnaire that will let you indicate just what you're looking for in a match.
happn is one of the hottest new Tinder alternatives, using a similar premise but supposedly with more success.
This app brings up people you have passed as you go about your day-to-day business, allowing you to like or pass on the people you've 'happn'd' upon that day.
e Harmony then uses 'science' to find you the matches with the highest likelihood of compatibility.
Moving on to more modern dating apps (although RSVP and e Harmony have incorporated apps, they are still far more browser-centric services), the most obvious contender is Tinder.
If you want to meet someone with a specific thing in common, there are plenty of niche dating sites popping up as well.
It's easy and free, and as you gain the confidence you can follow it up with a message. Our dedicated, award-winning support team are only a quick email away should you need help.
We also have loads of advice covering everything from dating, relationships and faith by top Christian writers on our Christian dating blog.
Coffee Meets Bagel is a dating app designed by women -- three sisters, to be precise -- and is designed for a much more considered approach to online dating.
Coffee Meets Bagel gives users just a single match per day, facilitating more meaningful connections rather than the dime a dozen approach of Tinder.