A FREE app, inspired by the death of Jill Meagher, that uses GPS technology to report sexual assaults will be up and running within months, according to the state's leading body against abuse.

The Centre Against Sexual Assault expects the app will help lower barriers for assaulted women who do not want to report incidents.

Jill Meagher.

The head of the south-east branch of CASA, Carolyn Worth, said the agency was developing the app - the first of its kind in Australia - to record patterns of crime against women. The idea for the app came after the death of 29-year-old Irish national Jillian Meagher in September.

''Several women went on Facebook in the days after Jill disappeared and said they had experienced similar incidents around Sydney Road, but none of them had reported them to the police,'' Ms Worth said.