Police say a St John Ambulance app was crucial in rescuing an injured mountain biker near Lane Poole Reserve in Dwellingup.
The rider, a man in his 50s, was winched to safety into the RAC rescue helicopter around 6.45pm on Monday.
He was then flown to Royal Perth Hospital with non life-threatening injuries.
The man had the St John Ambulance First Responder app installed on his phone which shared his exact GPS location with paramedics and DFES.
It also provided crucial first aid tips.

Pop-up ice skating rink glides back into Mandurah for winter school holidays
Federal opposition leader Angus Taylor sits down with local business owners in Mandurah
Police search for missing man last seen leaving Rockingham Hospital
West Aussies urged to be on high alert after surge in winter house fires
New $3.4 million boardwalk to be constructed at Lake Clifton thrombolites
City of Mandurah rolls out new tactile bin lids, accessibility stickers to support residents with low vision
Driver dies in hospital after Australind crash
Welfare concerns for woman with dementia last seen in Cooloongup
Charges laid over fatal West Coolup crash
