Dog Whistle - High Frequency Generator is a free Android app developed by Tech Arena Apps. As the name suggests, this app emits high frequency sounds ranging from 100 to 22,000 Hz, which are inaudible to humans but can be heard by dogs. This app can be used to train your dog, stop them from barking, and teach them tricks.

The app is easy to use and has a user-friendly interface that allows you to switch between different frequencies quickly. The app also features a tips section that provides valuable advice and instructions to help you successfully train your dog. Additionally, Dog Whistle - High Frequency Generator has a dog clicker to complement dog whistle training, and you can save custom whistles and play and edit previously saved ones.

It is important to note that long exposure to any sound might damage hearing. Therefore, avoid using this app on puppies and do not abuse your animals.

Overall, Dog Whistle - High Frequency Generator is a convenient and practical app for dog owners who want to train their furry friend on-the-go.