Want a whistle to blow? Now you get it. With this app you can get
1. Single Blow
2. Double Blow
3. Three Quick Bursts
4. Referee Game Call Blow
With all these whistle modes you can train your pets, organize a sport game as referee, or use it in other scenarios that you like. It will be very handy, and good luck with it!
Now you can also use it as flashlight, flash it as you like.