Anti Cats Repellent description

Do you want to keep away the stray cats from your home?
Your cat is attacked by other cats. No problem
This works by emitting ultrasonic repellent for cats that disturb the cats but not humans.
This app emits frequencies in the range (18-23 kHz) is not harmful to humans.
The only app with the right frequencies.
Note: frequencies 18-23 kHz can not be heard by humans. In this application the sound is mixed to be audible even to humans without losing their effectiveness.
Protects your cats.
Safe and not harmful