Internet data consumed depends on how much Rialto App is used: the more you consult it or apply changes, the more it consumes.

From the tests we made and from data at our disposal, we can confirm that data consumed per day is definitely limited.
For instance, with a daily check and a complete programming of the weekly chronothermostat, users has a consumption of about 10 MB per month, which is irrelevant for any mobile data plan. These data might vary with a dramatic increase if you leave your smartphone or tablet switched on with the Rialto App open.