Android: Crowdcast is supported on the latest Android devices right in the browser, no downloads required.
Apple iOS Devices (iPhone & iPad): You can download our iOS app to attend Crowdcast events. The link to this app will also be available to attendees in any event.
Apple is actively working on supporting the technology behind Crowdcast so in the future you'll be able to join without downloading anything at all.
Note that you can still register and watch replays of events on all mobile devices.