Ask HN: Where can I host a simple python app ? What pricing plan ?

I have a very nice python algorithm which I think could be useful / interesting for many people or projets.

I basically just need a simple interface, then to run the algorithm and give the results (think of the websites like online style transfer except that it's even simpler because it's not even a picture).

It could be a be bit computationally intensive in some cases and it could get some traction because i think it could be really interesting to a specific population, so it needs to be able to scale fast.

The thing is i'm basically broke.. I would have set up a private server but i can't afford 400 dollars now. What would you recommend ? pythonanywhere ? amazon ? something else.

If it works well I also would like to put some ads on the website to make money / create a pricing plan if people want to repeatedly use an algorithm beacuse it's useful for them.

Thanks!