The WA Police Minister is warning drivers not to use a Google-owned app that can alert motorists to the location of police and speed camera.

The Waze mobile app has thousands of users across Australia and describes itself as "all about contributing to the 'common good' out there on the road".

"That might mean helping them avoid the frustration of sitting in traffic, cluing them in to a police trap or shaving five minutes off of their regular commute by showing them new routes they never even knew about," the company says.

The Waze mobile application has thousands of users across Australia and describes itself as "all about contributing to the 'common good' out there on the road". (9News)

When users spot a speed camera, they log it on the app to warn others passing by, who confirm it's there at the press of a button, making it like the digital equivalent of flashing headlights.

The app is legal, but Police Minister Michelle Roberts says using it while driving, isn't.

"If you're entering any information, if you're touching the screen for example, then you are breaking the law," Mrs Roberts said.

"How would you feel if you hit a pedestrian, or a kid on a bike, because you were distracted because you were using an app like this.

"Using it to avoid police is just stupid, it's putting your life at risk, but more importantly it's putting other road user's lives at risk."

When users spot a speed camera, they log it on the app to warn others passing by, who confirm it's there at the press of a button. (9News)

Users say there's been a big increase in the number of Australian drivers logging information on the site.

Chris Doukakis said using Waze has meant he hasn't had a speeding fine in five years.