The Catylist platform uses the latest technology for mobile applications. No need to download any applications from iTunes or GooglePlay. Simply open your web browser on your mobile device, visit the Exchange system web site at carw.catylist.com, and log-in! You will get to enjoy the full features of the system and not a paired down limited featured version like other mobile applications often use. Catylist will automatically detect your screen size, resolution, and provide you with the best display for your device!