Named after a woman who was murdered by a former partner she met on Facebook, it allows people to check if their partner has a violent past.

BBC: Martyn Underhill

"It gives you feedback on the drive you just took and allows you to score it, " she said.

CNN: Fatal wrecks underscore risks for young drivers

It allows a woman to know she will always be able to care for herself and children, if something in their relationship goes awry.

FORBES: Magazine Article

Aware of the potential of her project but unable to finance it she applied to a government tender scheme that allows small businesses or individuals to bid for one-off jobs with public bodies, such as cleaning or construction contracts.

CNN: Top brass: Marching band keeps youngsters from gang life

Before Barr allows her two young children to use an app, she tests it thoroughly so she knows whether it can collect data or contains advertising that might be inappropriate for kids.

MSN: Software industry braces for new phone apps rules

She made it available on Kindles and iPhones, using an Amazon service which allows writers to turn their manuscripts into digital books.

FORBES: Kindle Approach Leads British Pair To Major Book Deal

"It allows me to guide their health more directly" and avoid unnecessary office visits, she said.

WSJ: When Email Is Part of the Doctor's Treatment

"Think of it instead as an interactive Rolodex that allows you to store, manage and tap contacts, " she advises.

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