Just had to download a clicker app with a $15/semester subscription, with reviews like:
"I will fail my class because of this app"
"Feeling hopeful? Don't."
"This app is incredibly slow; half the time it doesn't even load the random problems profs decide to put out - just shows a loading icon then records as "no response", which negatively affects your grades directly. Somehow this app feels more archaic than just screaming out "here" or the answer."
"Any professor who is even considering using this should be fired."
this is mst3k