A simple, powerful app for generating pure tones and clear sounds across the full human hearing range (20Hz to 20,000Hz). Ideal for speaker/headphone testing, audio calibration, acoustic analysis, hearing tests, instrument tuning, therapy, focus, dog training, and more.

- Play a custom sound sequence covering the entire audio spectrum
- Generate precise fixed frequency tones
- Create smooth frequency sweeps for full-range sound exploration

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The app includes limited free usage, allowing you to try its features.
For continued access and an enhanced experience, additional options are available through in-app purchases.

Payment will be charged to your Apple Account at the confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the end of the current period. You can manage your subscription or turn off auto-renew by going to your App Store account settings after purchase. Cancellation of the current active subscription period is not allowed.

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- Terms and Conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula