Condom-maker Durex has launched a free smartphone app for couples that puts their phones to sleep when intimacy calls. The company is hoping that couples will take their hands off their phones long enough for them to put their hands on each other.The app will switch off both phones at agreed times and, according to Durex, will ensure that neither partner can back out of an agreement to reduce time spent on the phone.When the switch-off kicks in, the app masks the home screen and puts the phone to sleep. But it can still accept calls.Durex and researchers at Britain's Durham University say couples could greatly improve their sex life by turning off their phones.But the founder of technology market research company World Wide Worx, Arthur Goldstuck, said the app was just a marketing gimmick."Two people agreeing to switch off their phones don't need an app. At my daughter's 16th birthday party she had a box at the door into which she got her friends to deposit their phones so that they could focus on socialising instead of phones. Amazingly, the box didn't need an app. And it cost nothing. Based on this campaign, she might now start a business selling empty boxes to ad agencies."But sexologist Catriona Boffard said some couples need an app to get them to turn off their phones long enough to turn each other on."Technology gets in the way of relationships, especially our intimate relationships, much more these days," she said...