Calton Hill, the Scottish mobile phone application developers, have announced that all golf course maps for their prize-winning GPSCaddy app are now free.

This makes GPSCaddy even better value for golfers.

GPSCaddy runs on phones that use the Android operating system and won a prize in Google's Android Developer Challenge last year.

It was launched on the Android Market at the start of 2010 and quickly established itself as a favourite app for golfers who own Android phones from a wide range of manufacturers including HTC, LG, Motorola, Samsung and Sony Ericsson.

GPSCaddy uses GPS technology to display accurate distances from the phone to the key features of the current hole such as the front, middle and back of the green and hazards such as bunkers etc.

Its unique user interface allows you to choose a detailed picture of the complete hole, or the remainder of the hole from the current position, or a close-up of the green and green-side hazards. Or you can choose a text-based display if you prefer.

Calton Hill provide a database containing GPS maps of thousands of golf courses worldwide and create maps of new courses to order for their users at no charge.

GPSCaddy also allows users to create or customize the maps themselves using their phone.