Best way to fax from iPhone

Hey all. I’m dealing with an outdated requirement — sending a fax — and I don’t have access to a physical fax machine or landline. I thought I’d just download an app and handle it from my iPhone, but there are way too many choices. I only need to fax a couple of times a year, so I’d prefer something simple, trustworthy, and not bloated with features I won’t use. If anyone knows of an app that just gets the job done without all the fluff, I’d really appreciate the help.