Ask HN: What app do you suggest I build?

(I might get flamed for this but Perché no)

I have been a PM for many years. I used to be a dev (a reasonable one) but I have been out of it for a while. I want to build an app just for fun. I would like to use some AWS (maybe some serverless stuff). I would also like to make some money (not millions) out of it. It would be a solo effort but if it goes somewhere I am happy to take a go at it.

Dear HN, do you have any app ideas for me?