Dog Whistle You have a naughty dog? Forget about expensive dog training classes! Here comes the best free Dog Whistle app for Android that will help you for sure. Google Play: Code: https://play.google.com/store/apps/details?id=com.dogwhistle.dogtrainingandroidapp Whistles for dogs have a much greater advantage in dog training in relation to human voices and represent excellent dog training equipment. Human voice can vary depending on their emotions while a dog whistle sound is always constant. With this dog training whistle you can call him from a distance, teach your puppy to learn new tricks, or make him stop barking and making a mess. It is also good for those who are afraid of dogs and want a whistle that works as a dog repellent.