Natural Moose Calls is a free application that contains vocalizations of real moose sounds that were recorded in their natural habitat. You can listen to the 24 audio tracks that were picked up from the territory of the outfitter Pourvoirie Le Chasseur, in eastern Quebec, known for its high moose density.

In addition, there's a detailed explanation of each sound that the moose make such as the origin and the purpose of why they make that specific sound. 

If you would like to practice your vocalizations by reproducing real moose sounds, then you should download this app. It's free and has a user-friendly interface.