A mother who became frustrated by her teenager's failure to answer her calls has created an app that disables youngsters' phones if they refuse to respond.

The "Ignore No More" app was invented by Sharon Standifird for all parents who have gone through the experience of trying in vain to reach their children.

Ignore No More lets parents lock their childrens' phones ...

Furious after she wasted an entire day attempting to contact her son Bradley by phone call and text, Mrs Standifird said the idea for the app came to her as soon as she knew he was safe.

Mrs Standifird decided that what was needed was an app that "just shuts their phone completely down and they can't even use it".