This cool Android app generates frequencies from 12000Hz to 44000Hz and you can find out to which frequency your dog responds to. Hand signals are often combined with dog whistles for better dog training to make dogs react the way you want. It can generate piercing sounds to scare away the wild ones as it comes with qualified frequency generator and frequency saving options. Dog whistle Lite 2.0 includes brand new UI for more convenient usage.
Download this Free Android App from this.