Fax apps that work internationally?

International faxing was a concern for me too, especially when dealing with overseas partners. Not all fax apps support international numbers reliably. I found clear guidance in https://geekflare.com/software/best-fax-iphone-apps/ , which reviews fax apps for iPhones in 2025, including international support. From my own experience, using one of the recommended apps made international faxing smooth and predictable. I’ve sent documents abroad without failed transmissions or confusing fees. Having everything handled directly from my iPhone saved me a lot of time and made communication much easier.