EPA mode allows the moisture level to deplete to a lower level than deep mode before next watering, and it has longer watering duration than any other smart watering modes. We recommend using EPA mode to avoid watering equally everyday and instead to water less frequently but deeply.
Regular mode: the default one, which should work for most of customers
Deep mode: water infrequent to help plants grow deeper roots
Frequent: water more frequently, for plants with short roots, e.g flowers
ECO: saving more water than regular mode.
Boost: if you need more water.
You can try each mode and check the results on schedule pages, then choose the best one for your plants and land.