We have covered plenty of irrigation controllers here in the past. The iWater Wizard 12-Zone Irrigation Controller is another one you can use in conjunction with your iOS devices to take better care of your garden. You can create a zone map of your yard with Google Maps, set custom watering schedules, and save money in the process. The companion app happens to be free.
The device is easy to install. Just remove your old controller, replace it with the iWater Wizard, and re-connect the existing wires. The 12-Zone Irrigation Controller is powered by a 24V AC power adapter. Sets you back $129.95.