Sony SRS-XB40 has a built-in multi-coloured line light, speaker lights and a flashing strobe.It features 24 hours of battery life and claims to be a 'mini-disco on the move'.

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This hook up app for friends (and friends of friends) is the equivalent of passing 'I Like You' notes in class.

The USP: Hook up with the people you walk past on the street.

Kieran Mccartan does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond the academic appointment above.

The Conversation UK receives funding from Hefce, Hefcw, SAGE, SFC, RCUK, The Nuffield Foundation, The Ogden Trust, The Royal Society, The Wellcome Trust, Esmée Fairbairn Foundation and The Alliance for Useful Evidence, as well as sixty five university members.

A second glitch seems to be that once users have indicated they are 'Down to Bang' a friend, there appears to be no way to revoke it - the button no longer works once it has switched to 'Awaiting Bang'.'Unless you're someone who believes (almost certainly wrongly, by the way) that your Facebook friends are all dying to hook up with you, and would do so if only given the bright blue button to admit it, the app doesn't really offer you anything you couldn't already accomplish on Facebook without it,' she wrote.'How many people would really freely admit to wanting to hook up with a friend who wouldn't already have some indicator of interest?

Shouldn't you already kind of know your chances with your Facebook friends?

As a result there is now no end of apps with the same aim of helping you fall in love (or at the very least get laid).

Here, we take the biggest alternatives to Tinder and give them a spin to find out what (if anything) they do different.

View the full list An app on offer in the US says it can determine whether the person you are dating has anything to hide, using facial recognition to see if they are on the sex offenders register.