Queensland scientists have developed a "ribbiting" app that can identify a frog by its croak and shows what species can be found where.

The Frogs of Australia - eGuide features descriptions, location maps, call sounds and photographs for nearly all of Australia's 238 known frog species.

The Frogs of Australia - eGuide developed by James Cook University researchers. Credit:JCU

James Cook University biologist Dr Conrad Hoskin said the frog spotting app, which took three years to create, was released last week and was already proving popular on iTunes.

"There are a lot of people who like frogs," he said.