A simple and user-friendly app that lets you play sounds at specific frequencies.

Bonus Feature: Easily clean your phone's speakers from water with just one button press—no complex settings required!

Noise Level Measurement: The app also measures current noise levels. It needs microphone access for this feature. If you declined access initially, go to Settings > Privacy > Microphone and enable access for the sound level meter to work correctly.

Premium Subscription:

Upgrade to professional access with an auto-renewing subscription. Payment is charged to your iTunes account upon purchase confirmation. The subscription renews automatically for the same price and duration (weekly, monthly, semi-annual, or annual) unless canceled at least 24 hours before the end of the current period. You can turn off auto-renewal anytime in your account settings. Subscription prices may vary by country.