During the subscription period, you can permanently say goodbye to the interruption of advertisements; the decibel test is more sensitive and accurate; all toolkits are used for free; the priority experience of more functions is obtained.
Provide continuous subscription after VIP free trial, VIP continuous weekly subscription, VIP continuous monthly subscription, and VIP continuous subscription annual subscription options.
You can cancel your subscription or free trial in iTunes settings at least 24 hours before the end of the free trial period.
Subscriptions that include a free trial period will automatically renew to a paid subscription.
* Subscription fees will be charged to your iTunes account at confirmation of purchase and at the beginning of each renewal cycle.
Cancellation of subscription will take effect after the last day of the current subscription period.
*Note: Although we provide high-precision algorithms, due to the limitations of hardware specifications of mobile devices such as mobile phones, it cannot completely replace professional equipment.
This time, your mobile phone is a professional decibel testing instrument that can provide you with noise detection anytime, anywhere.
The data is for reference only.
Once the cancellation of subscription takes effect, your subscription service rights will become invalid.
