Depends on the dog – Dog Whistle - Train Your Dog free Dog Whistler Review

It worked on one of my dogs, but the other dog just looked at me like I was crazy. The dog that listened is more well trained, but I think it just depends on if your dog wants to listen or not. I'd get the app it's free, and it's worth a try.
Review by Fuzzy little puppy on Dog Whistle - Train Your Dog free Dog Whistler.