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The app plays sounds that can help you test your speakers. With the help of a sound level meter, you can find out how many decibels and hertz the device you are checking reproduces. You can also find out if the microphone on your phone is clogged. Upgrade to Premium: - Unlock Unlimited Sound Testing: Test your speakers unlimitedly. - Get Unlimited dB Meter: Measure the noise levels in your surroundings endlessly. - Enjoy an Ad-Free Experience: No ads to interrupt your experience! Subscription Details: Payment will be charged to iTunes Account at confirmation of purchase. Subscription with a free trial period will automatically renew to a paid subscription. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Account will be charged for renewal within 24 hours prior to the end of the current period at the rate of the selected plan. Subscriptions and auto-renewal may be managed by going to Account Settings after purchase. You can cancel your subscription or free trial in the iTunes settings at least 24-hours before the end of the free trial period. The cancellation will take effect the day after the last day of the current subscription period and you will be downgraded to the free service. Subscription Options: - Weekly: $3.99 - Monthly: $6.99 - 6-Month: $24.99 - Annual: $39.99 For other currencies, the price corresponds to the same tier on the App Store Pricing Matrix. Privacy Policy: https://appchi.org/privacy-policy Terms of Use: https://appchi.org/terms-of-use Support: support@appchi.org EULA - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/