Best free quiz plugin … and more

I needed a powerful plugin for quizzes used at a top level event. Tried a lot, but Watu was immediately the most easy to use, with a lot of functionalities and perfectly operational on smartphones (an important requirement for the project). Free version almost suits my need, but to go further, I bought Pro version and it worths every penny. Support is awesome, very effective and very kind. Desserves its five stars, even for the free version.