I didn’t want to waste money either, so I checked reviews and found this article: https://venturebeat.com/business/5-best-iphone-fax-apps-send-documents-from-your-mobile-in-2025 . After comparing, I chose Municorn. What I liked was that it didn’t feel complicated — no confusing setup. I’ve sent signed PDFs and a few forms through it without issues. For me, the key thing was reliability. Municorn just worked quietly in the background, which is exactly what I needed.