DisplayNote is comprised of two components; the DisplayNote software running on a host device and the DisplayNote app running on connecting devices.
The DisplayNote desktop software currently is available on Windows (Windows 7 and above) and Mac OS X (10.7 and newer) - Minimum specs required: Core2Duo with 1GB RAM (2GB recommended).
The DisplayNote app is available for free on iOS (from the App store) and on Android (from the Google Play store). The Android app can also be installed on Chromebooks which have access to the Google Play store.
A web version is also available for participants to connect, connect to DisplayNote for Chrome browser here: http://join.displaynote.com