I hunt in Texas and I downloaded this app to my iPad. I placed my Bluetooth speaker a few yards away and set a certain call to go off every 8 minutes. It brought in hens and gobblers and helped me harvest a nice gobbler yesterday evening. It’s a well designed product that’s simple to you. If I could make a recommendation, it would be to allow a “playlist” to be made. For instance, if I only wanted certain yelp calls to be rotated or shuffled, then I could create a yelp only list and press “shuffle” to run at a frequency I desired. Again, great app and did a phenomenal job at bringing in birds.