A few times a year I have to send faxes, but I don't want to waste money on a printer or find a copy shop. Is there an Android app that works quickly and easily?
Totally get you. I had to fax a signed contract recently and didn't want to deal with hardware. I came across this article: https://www.slashgear.com/1762462/municorn-android-fax-app-faxes-smartphone-mobile-simple/ — it introduces the Municorn app, and it's awesome. Very intuitive and worked without any setup. I took a photo of the doc, typed in the number, and it was sent. It's a great solution if you just need to fax occasionally without the hassle.