The Zillow Rental Manager App is currently available for iOS and Android devices in the iTunes store and the Google Play store. You can download the app directly by following the links provided here:
Zillow Rental Manager App for Android: https://play.google.com/store/apps/details?id=com.zillow.postlet
Zillow Rental Manager App for iOS: https://itunes.apple.com/us/app/zillow-rental-manager-post/id759202892?mt=8