How often is the data sampled/saved? The graphs indicate variable sample times with variables, such as moisture, taking sudden drops after long periods of fixed value. Is this poor resolution of graphs, inconsistent operation of the device? The depletion of moisture in the soil is not a "jerky" process.
If you provided basic data with fixed time intervals, the user could make intelligent decisions on time/frequency of watering, since the recommendations are useful for any of the locations I've measured. You do not recommend plants that are growing very well in a location, so providing me the data would make the device worth using.