Your next question seems like a crucial point to me. Bed nets are imperfect but since mosquitos can feed on on other animals, I suppose mosquito populations don't disappear when entire regions use bednets more often, they just slowly become less malaria-infected.
Very enthusiastic about this project, which I agree can fill an important gap in the learning journey. I will follow with great interest!
I think it would be relatively simple to replicate for languages other than English in the future. (after this passes beta phase, of course!)
Not as high brow as other suggestions: How to make friends and influence people. It's useful for the most obvious reasons and also, in my opinion, an accessible nudge towards empathy thanks to the numerous examples.
In a scenario where this tech works as well as we are dreaming of and has generalized in hundreds of millions of buildings: isn't there a risk of a general weakening of our immunity systems, making us?
Basic logic behind this question: certain/many classes of virus eradicated from many modern buildings => our bodies are generally less prepared to encounter it in other settings => the day the setting changes, we are especially vulnerable.
(epistemic status: I'm very ignorant in these fields)