Dog Whistle Handy to Train Dog is a free iPhone app developed by Maoli Wang. This lifestyle app is designed to help dog owners train their dogs using a dog whistle. With adjustable sliders for frequency control, the app allows users to generate variable frequency tones within the range ofHz toHz, with only frequencies belowHz audible to the human ear.

The app offers two modes of communication with the dog: manual and continuous. In the manual mode, users can touch the screen to play the dog whistle training up sound and move their finger to stop it. In the continuous mode, users can touch the screen to play the sound and touch again to stop it.

To effectively train the dog, the app provides useful puppy training tips and suggests using a series of commands as signals. For example, two short whistle sounds could mean the command "stop," while one long whistle sound could mean "sit." The app also encourages users to combine verbal commands with whistle commands to facilitate the dog's understanding of the sounds.

Dog Whistle Handy to Train Dog also includes a sound level meter and a saved settings bar for easy access to preferred frequency settings. Whether you need to call your dog from a distance or train them to respond to specific commands, this app provides a convenient and affordable solution for dog owners.