Are you looking for some free apps？ 10,000+ users downloaded Pet Whistle latest version on 9Apps for free every week! It works great even on 2G. This hot app was released on 2015-08-29. I believe that if you are an android apps lover, you would not miss it.
Pet Whistle is a free and simple app which can play high frequency sounds. This is a useful tool which you can use to signal your dog or teach your dog new tricks.
Disclaimer: Not all pets might react to the high frequency sound. My own dogs react to it, so I hope others will find this useful.
9Apps 4.9
