With the objective of protecting users from an attack in any part of the world, a small Melbourne company has developed a singular mobile phone 'warning system' - called "I am Safe" - for the popular Apple iPhone.

It was the deadly attack on Australian backpacker Britt Lapthorne in Croatia that inspired software designer Tim Hine, chief executive of Xpertise Mobile, to develop the security system which serves as a panic button for users in jeopardy.

On sensing danger, users of the security application can send a pre-recorded "panic" SMS and email messages to a programmed list of five family members or friends.

The "I am Safe" app instantly transmits the exact whereabouts of the user to the listed people, via eye-in-the sky GPS satellite technology.

In addition, the service also activates a Google Map to track the location of the user; and even broadcasts an audio recording of the intimidating episode. The app also causes the user's own phone to ring, hoping to scare away a probable assailant.

The innovative app, which will help ensure the safety of people, especially backpackers, women and teenagers, will be initially available only to iPhone users. Later on, it will be ported to other platforms, including the Google Android.

Though the initial cost of the app will be $US2.99 for a limited period; the cost will later change to $US6.99.