Dog Whistle and Clicker is a free Android app developed by EnL Design Studio that provides a clicker and whistle for dog training. The app features high and low pitch dog clicker, as well as high, medium, and low pitch dog whistle sounds. The clicker can be used as a stimulus for obedience training by creating a positive relationship between food, praise, and the sound of the clicker. The app is easy and convenient to use, making it perfect for pet owners who want to train their dogs. However, it is important to note that the whistle sound may not be audible to humans, but it can damage a dog's hearing if played too close to their ears. Overall, Dog Whistle and Clicker is a helpful tool for dog owners who want to train their pets and develop a better relationship with them.