No... no payment. App is really useful for turning on individual sprinklers to test. I use Dark Sky as my in-app weather provider it's very accurate. 

Hi Roman,

We currently provide two purchase plan for our customers, one-time purchase and subscription.

Subscription is another selling plan, which is different with one-time purchase. Those subscription units will have limitation on usage period. If you purchase full price and one time purchase product, there is no limitation on usage period and we will not charge any additional fee. 

Thanks,

Netro Support