There is an website (mobile-optimized to eliminate app downloads or spying): socrative.com. It does everything the iclickers used to do and more. You can, optio

There is an website (mobile-optimized to eliminate app downloads or spying): socrative.com. It does everything the iclickers used to do and more. You can, optionally, upload class rosters and make students log in, or you can use it anonymously. It’s free for small classes and $50/year flat fee (billable to the administration) for large lectures.