The RainMachine WiFi sprinkler controller is now in stock at Amazon and selling for $175. This unit will control up to 8 zones and uses free NOAA weather data for your area to determine how much to water on any particular day.
The RainMachine has both IOS and Android apps and claims that the app will automatically discover any RainMachine on your WiFi.
BONUS: For a limited time you can use the coupon code RainMini to cut 25% off of the already low Amazon price. That’s $43.75 off!