Hello. I recently checked a comparison https://onpattison.com/news/2026/mar/06/best-iphone-fax-apps-2026-top-apps-to-send-a-fax-from-your-iphone/ guide on onpattison, and the detailed info is available there. Out of the apps mentioned, Municorn Fax App stood out to me because it keeps mobile faxing really straightforward - scan documents, attach PDFs, and send them directly from iPhone without extra setup. They also review other fax solutions in the same article if you want alternatives.