Dos whistle app is a Canine whistle simulator and is great for training your dog. Uses of Dog Whistle App ++++ Your dog stops barking when guests arrive to avoid disturbing. ++++ Call your dog when you need it ++++ Adjust the behaviour of the dog. ++++ easy to use application ++++ Adjust the audio frequency from different words Thank you for Downloading the Application . Please write to us for application related support . Thanks, Esperto Team