Dog whistle emit sounds in the high frequency range. Humans can only hear up to 20 kHz, but dogs have much better hearing. Since dog whistle are silent to humans, but loud to dogs, they are perfect for training dogs. Dog whistle - High Frequency Generator is the number one dog whistle app to train your dog.This Dog Whistle app can emit high frequency sounds anywhere in the range from 100 to 22,000 Hz.Dog Whistle can be used to train your dog, stop your dog from barking, and teach your dog tricks.Thanks for downloading the most efficient dog whistle app for android on Google Play Market! DOG WHISTLE can help you train your dog for free in a fun way. Just blow the dog whistle and your furry friend will react to that. Its a free dog trainer app which uses the traditional dog whistle to interact with your pet(as they can hear dog whistle).Features of Dog Whistle - Free Dog Trainer:- No late night barking- call your dog using dog whistle- train your dog to do cool tricks by training it- dog whislte- change your dog behaviour- shut your neighbour dog using dog whistle- stop your own dog- dog trainer - dog whistle- annoy your friends by high frequency sound / tone- frequency generator- dog whistle- tone generatorHow dog whistle works:Dog Whistle app generates frequencies ranging from 200 to 22000 hertz. Dogs hear those sound very well, and those sounds are always the same. That makes it very easy to teach your dog new tricks. Proper tutorial will be implemented in future app update. Remember to not abuse your animals!!! Long exposure to any sound might damage hearing. And that might be a crime. Also don't use this app on puppies.Rate and share dog whistle app with your friends!