Description

This APP is really a useful tool for our life! It can emit different frequency sounds and help you a lot!
Features:
***Tone Generator ***
It can generates different tones from 20 Hz to 20 kHz.You can even use it to stop your neighbor's dog from barking

*** Mosquito Repellent ***
By emitting a high frequency sound inaudible to humans, mosquitoes will stay away. Keep the application close to you and no need to worry about mosquitoes!

*** Ear Age Test ***
You can also test the age of ears. As you get older, you may lose the ability to hear high frequency sounds. You can identify your ear age by how far high frequency you can hear.