13 sound bites that will attract moose while hunting. Easily connect to an external speaker to boost the effectiveness of the calls. All moose calls are stored on your device, so you'll never have to worry about service. A versatile selection of calls will allow you to adjust your strategy on the on the fly. Long drawn out calls to call other moose from far away or short grunts to peak their interest when they are close. These are field proven calls and the app is built with simplicity in mind. No fumbling around when the situation gets intense in the heat of the hunt, just tap the desired sound to play, tap again to stop.