Amazon offers the Rachio Iro 8-Zone Smart WiFi Irrigation Controller for iOS or Android, model no. 8ZULW, for $175.82 with free shipping. That's the lowest total price we could find by $4, although we saw it for $8 less in November. 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).
Of note, Best Buy offers the Rachio Iro 16-Zone Smart Irrigation Controller, model no. 16ZULW, for $199.99 with free shipping. (Amazon charges the same.) That's $39 under our May mention, a current low by $54, and the best price we've seen.