'Poll Everywhere' is a real-time survey service that is very commonly used at conferences, classes, lectures and other events.
Basic functions of Poll Everywhere are totally free of charge for meetings with 25 responses or fewer.

Activity attendees can vote on choices by accessing a set URL via their personal mobile phones or computers, or by sending a text message to a set phone number. Voted responses are automatically tallied and will be displayed on the presentation screen simultaneously, while all the votes will be anonymous.

Participants can answer any number of questions raised by the presenter, and the presenter can share the total results with everyone, making discussions at web conferences or seminars more interactive.

To get started with Poll Everywhere, please