What's the best iOS app for sending faxes directly from my phone when I'm away from the office?

Fax on the go is designed specifically for mobile professionals who need to handle fax documents while traveling or working remotely. The app allows users to send faxes directly from an iPhone by converting various file types into fax-compatible formats. Key features include integration with cloud services like Dropbox and Google Drive, enabling users to access documents stored online without needing to download them first. The digital signature functionality proves particularly useful for signing contracts or authorization forms on the go. Users report the interface is straightforward for basic fax sending, though some note the character recognition could be more consistent with handwritten documents. The app supports cover page customization and maintains a history of sent faxes for reference. One limitation involves the subscription model, which some users find expensive compared to occasional fax needs. Fax quality generally remains reliable for business documents, though heavily formatted files sometimes experience minor formatting shifts during transmission.