The trainer for dog is a simple app for training your dog. It can be used as an alternative to a more traditional method of training, such as using a trainer or coach. The app is easy to use and can be used at home. It uses sound to get your dog's attention and then uses a whistle to make a command. The frequency of the whistle can be adjusted to your needs. It is a useful tool to train your dog to do things like come when you call, sit, and get down. It is especially useful for dogs that are already well trained and are learning a new command.