Free fax apps vs a paid service: what to know

What free usually means

Every fax uses a phone line somewhere, so someone pays for it. Free fax options generally cover their costs in one of a few ways. Read the app's description, pricing and reviews to see which applies.

Also check who the developer is, when the app was last updated and whether the support page lists a real way to reach someone. A fax that fails without explanation is frustrating when a deadline is close and there is no one to ask.

• A small number of free pages, then in-app purchases or credits
• A free trial that turns into an automatic subscription
• Advertising added to the cover page or the app
• Sending only, with no fax number of your own for replies
• Limited destinations, for example US numbers only

When a paid service makes more sense

If you fax once a year, a free option or a print shop might be enough. A paid service starts to pay off when you need a fax number people can send to, when you fax every month, or when the documents are confidential.

faxappsforiphone.com recommends FaxToFax.com. It is not a free app; it is a paid, browser-based service with no app to install. You use it in Safari on your iPhone, and on a computer when you are at a desk.

• Personal: $4.99 for the first month, then $18.99 a month for 200 pages sent and received, 1 user and 1 fax number
• Business: $14.99 for the first month, then $39.99 a month for 500 pages, 5 users, a shared inbox and a BAA
• Annual billing saves about 17%, and you can cancel online any time

How to decide

1. Count how many pages you send and receive in a typical month.
2. Decide whether you need your own number to receive faxes.
3. List the kinds of documents you fax and how sensitive they are.
4. Compare the real monthly cost, including per-page or overage charges.
5. Check how you get proof of delivery and how long records are kept.