Terrible
Response from developer
Hi , it is an issue with the iOS version 13.1.x please update your Phone to the latest iOS version 13.2.x and enjoy using the application Thanks

This utility app simulates dog whistles at various frequencies, silent to humans but audible to dogs. Use it to train your canine companion, stop barking, or teach new tricks. It offers adjustable audio frequencies for effective dog behavior modification.
3.0
August 21, 2019
Performance Improvement
Hi , it is an issue with the iOS version 13.1.x please update your Phone to the latest iOS version 13.2.x and enjoy using the application Thanks
Dog Whistle can emit sounds at 5 Hz, 6 Hz, 9 Hz, 10 Hz, 15 Hz, and 19 Hz. These frequencies are designed to be audible to dogs but silent to humans.
Dog Whistle can be used to train your dog by emitting specific frequencies to get their attention, stop unwanted barking, or teach them new tricks. The app is designed to be easy to use for behavior modification.
The app is intended for dog training and behavior adjustment. While dogs have better hearing than humans, individual dog responses may vary. It is recommended to use the application responsibly.
No, this application does not contain advertisements. The developer offers a Pro version to remove advertisements and enable continuous mode.
Dog Whistle is compatible with iPhones, iPads, and iPods. It is available for iOS devices.
The latest version of Dog Whistle was updated on August 21, 2019. The app was initially released on April 28, 2019.
Dog Whistle has an age rating of 4+, making it suitable for a wide range of users.
The Pro version of Dog Whistle includes a continuous mode for hands-free operation and removes advertisements. This allows for uninterrupted training sessions.