Questions to speaker per Smartphone in University lectures I was at the MIT-Vienna-Conference and they had a pretty nice App-System (Superevent), where Questions to the Speaker could be asked per the Superevent-app, upvoted from others and finally answered by the speaker, all without hand-raising, etc.

I now would like to try to implement that sort of "Guerilla" in my University for Lectures, since the Professors will never agree to use something like this in the near future. Therefore i also don´t have the money to buy a Conference App. Most of them are restricted to 25-75 people in the free plan, but we normally have 150-200 people sitting in a lecture.

So here´s my question: Does anybody know of free solutions of this?

My primal need is: Question to speaker-App for Android and iOS

My wish would be: An own "Help-area" for each lecture, possibility to provide resource-links, up and downvote(Evaluation) of lecture.

I could get my hand around some money by asking the student committee, but most of the conference apps work on a plan per conference, which would be way to expensive for all the lectures in my study.
This free guide - the Event App Bible - lists lots of conference/event apps. I believe there are a mixture of free and paid-for systems included. You should look at the "Audience Response Systems" to id apps that offer this type of functionality, and cross reference that against the pricing table. Hopefully you can find something that works for you. (The guide comes from the Event Manager Blog and was updated recently (2015))