Great and easy to use!

Buy credits, take a photo of what you want to fax, adjust the contrast, enter the destination fax number (remember to drop the first zero for Japan numbers because it starts from country code), make a cover page (if you want to), and hit send.

For the once or twice a year I might have to send a fax, its perfect!

tokyololas about FaxFree - Send Fax From iPhone, v3.4