Ascend is the companion app for the 8c. It is available as a native mobile app and as a web app that you can use in any modern browser.
You can find the native app for iOS and Android in the App Store and Play Store respectively. The web application and through your local network, if your 8c's are connected to it. To access the locally hosted version, simply open a web browser and go to http://8c-XXXX or http://8c-XXXX.local, replacing "XXXX" with the serial number of one of your 8c's.