Let's say you need to monitor 2 construction sites. You establish an account on March 15th and your card will be charged:
This effectively pays for monitoring service from March 15 to April 14. Then, on April 15, your card will be charged again based on the locations WaterWatch PRO is monitoring in your account and the $10 account fee. This will pay in advance for monitoring service from April 15 to May 14.
Continuing from the example above..You add a 3rd location via the WaterWatch PRO app on April 1. You will be charged the following on April 15:
Now suppose on May 10, you cancel one of the locations you originally entered on March 15. Since you' "pay ahead" for each location, you will receive prorated credit for the days not used by the billing date.