Home Depot offers the Rachio Iro 8-Zone Smart WiFi Irrigation Controller for iOS or Android for $199 with free shipping. (Amazon offers it for the same.) That's the lowest total price we could find by $51. It automatically adjusts your watering schedule based on weather, seasonality, zone-type, and regional characteristics and can be controlled via the Rachio iOS or Android app. It's also compatible with the Wink home automation system and works via the Wink iOS or Android app (no Wink hub is required).