MAIN FEATURES:
- Hertz app generates a sine wave tone with easy precise control over the frequency.
- Swipe your finger up and down to raise or lower the frequency of the tones.
- Plays tone sounds to help you test your speakers.
- Directly check the frequency by professional wave visualization.

SUBSCRIPTION PLAN:
- If you join to purchase Premium, payment will be charged to your iTunes account, and your account will be charged for renewal within 24-hours prior to the end of the current period.
- Auto-renewal may be turned off at any time by going to your settings in the iTunes Store after purchase.
- Any unused part or time-span of a free trial period will be forfeited, as soon as you purchase a subscription.
- Prices are in U.S. dollars, may vary in countries other than the U.S. and are subject to change without notice.
- Terms of Use: https://tangjiali0630.wixsite.com/hertz/terms-of-use
- Privacy Policy: https://tangjiali0630.wixsite.com/hertz/privacy-policy