Flickr/Achi Raz The most important piece of equipment for your love life could be your smartphone.

Dating apps can help you find true love. And once you find it, there are apps that help track a woman's fertility to help avoid pregnancy or to help couples get pregnant.

One of them is an app called Kindara, used by over 500,000 women.

Thanks to sex-survey research conducted by Kindara with 500 men and 500 women in Kindara's users community, we're learning a bunch of stuff about people's sex lives we didn't know before.