Do NOT buy
They charge you for your "free" month if you decide to cancel. I spent hours sending duplicate faxes because they were unsuccessfully transmitted. I had to send each fax 2-3 times. Waste of time and money. Use the "FAX" app in dark grey. It is linked to your iTunes account.
Mkky007 about
eFax App–Send Fax from iPhone, v4.7.2