DO NOT BUY!!

I used this app a couple of years ago on my Mac and it worked fine. I needed to send a fax so I bought some credits andI tried for several days on several different devices to get this updated app to send a fax. All failed with "Telephony Error", which doesnt give enough information to properly troubleshoot.. Contacted support and recieved no reply. I would recommend everyone steer clear of iFax.

JoshuaoSensei about iFax - Send & Receive Faxes, v6.0