By Sarah Martinez · Published April 21, 2026 · Updated June 8, 2026 · 8 min read
Quick Answer: The best iPhone fax app in 2026 is mFax — 4.8 stars on the App Store, 5 million users, 98% delivery success rate, and no mandatory monthly contract. Download, upload a document, and your fax is sent in under 2 minutes.
There's no built-in fax app on iPhone — Apple never added one. If you need to send a fax from your iPhone, you need a third-party iPhone fax app from the App Store. The good news: modern fax apps are fast, cheap, and far more convenient than driving to a UPS Store or FedEx Office.
This guide covers the best iPhone fax apps in 2026, what makes a good one, and exactly how to use one — so you can stop overthinking and start sending.
The Fastest Path
Download mFax from the App Store, upload your PDF or scan a document with your camera, enter the fax number, and tap Send. Done in under 2 minutes — no contract, no subscription required.
What Is an iPhone Fax App?
An iPhone fax app is a mobile application that lets you send and receive faxes over an internet connection, with no fax machine, phone line, or desktop required. You upload a document (PDF, photo, Word file), enter a fax number, and the app converts and delivers it as a standard fax transmission.
The best apps in 2026 offer:
- Document scanning — photograph paper documents with your iPhone camera and send them directly
- Cloud uploads — attach files from iCloud Drive, Google Drive, or Dropbox
- Delivery confirmation — get a receipt with timestamp and status when your fax goes through
- Virtual fax numbers — receive incoming faxes without hardware
iPhone fax apps cost far less per page than store faxing ($1.89–$5.99/page at UPS or FedEx). Most let you send a short fax for under $2 total.
The Best iPhone Fax App in 2026: mFax
For most iPhone users — personal faxing, tax forms, medical records, contracts, real estate paperwork — mFax is the clear top choice.
mFax — Editor's Pick
mFax is built for people who need to fax occasionally without committing to a subscription. Open the app, upload a PDF or snap a photo of your document, type the fax number, and send. The interface is clean and the delivery rate is class-leading. Over 5 million users have trusted it for everything from IRS form submissions to real estate closings.
For business teams or healthcare providers, mFax Business adds HIPAA compliance, virtual fax numbers, team accounts, and a web dashboard — starting at about $9/mo (billed annually). It's fully customizable: instead of locking you into rigid tiers, you build your own plan with a live calculator, picking the exact seats and pages you need and paying only for what you use.
Pros
- Pay-per-fax model — no forced monthly subscription
- 4.8-star App Store rating with 5M+ users
- 98% delivery success rate with confirmation receipts
- Scan with camera directly in the app
- Works for both personal and business use
Cons
- HIPAA plan requires mFax Business upgrade
- Per-credit pricing adds up for very high volumes
Top iPhone Fax Apps Compared
| App | Best For | Starting Price | Free Option | HIPAA |
|---|---|---|---|---|
| mFax ★ | Most users (personal & business) | Pay-per-fax / From $9/mo Business | Pay-per-use | Business plan |
| iFax | Security-focused users | $8.99/mo | 5 pages/mo | Yes |
| Fax.Plus | Heavy receivers / free tier | Free / paid plans | 100 pages/mo | Paid plans |
| eFax | Enterprise & long-term users | $15.99/mo | No | Yes |
| FaxBurner | Rare one-off faxing | Free / premium | 5 pages/mo | No |
iFax
iFax is a well-designed app with strong security credentials — 256-bit encryption and HIPAA compliance on all plans. Its $8.99/month starting price is competitive, and it includes a free tier with 5 pages per month. The app is polished and works reliably. The downside: HIPAA features are locked behind higher-tier plans, and the free allowance is very small.
Best for: Users who prioritize security and send faxes regularly.
Fax.Plus
Fax.Plus stands out for its generous free tier — 100 pages per month at no cost, the most of any major app. The in-app document scanner uses smart edge detection to auto-crop pages cleanly. Like iFax, HIPAA compliance requires a paid plan. If you receive more faxes than you send, Fax.Plus is an excellent option.
Best for: Users who need a free plan or primarily receive faxes.
eFax
eFax is the oldest name in online faxing with 25+ years of history and 12 million users. Its $15.99/month plan includes 300 send/receive pages, a dedicated fax number, and 24/7 support. The iPhone app is functional but not the most modern. It's best suited for businesses or individuals who prefer a well-established brand with a permanent fax number.
Best for: Users who want a dedicated fax number and enterprise-grade support.
FaxBurner
FaxBurner is the only iPhone fax app with a truly free tier that never expires — 5 outbound pages and 25 inbound pages per month. It's ideal if you need to send a fax once or twice a year and don't want to pay for anything. For regular use, the 5-page monthly limit is too restrictive.
Best for: Very occasional faxing where cost is the only priority.
How to Send a Fax from Your iPhone (Step by Step)
Using mFax as an example — the process is similar for all major iPhone fax apps.
Download the mFax App
Search "mFax" in the App Store or visit mFax.to from Safari. Create a free account — just your email and a password.
Add Your Document
Tap the + button to attach your file. You can:
- Upload a PDF or image from your iPhone's Files app or Photos
- Connect iCloud Drive, Google Drive, or Dropbox
- Scan a paper document by pointing your iPhone camera at it — mFax will detect the edges and flatten the image automatically
Enter the Fax Number
Type the recipient's fax number, including the country code for international faxes (e.g., +1 for the US and Canada). Double-check — there's no "recall" once a fax is in transit.
Add a Cover Sheet (Optional)
Tap Cover Sheet to add sender info, subject line, and a brief note. Use our free fax cover sheet generator if you need a professional template.
Send and Confirm
Tap Send. You'll receive a push notification and email confirmation once the fax is delivered. The confirmation includes a timestamp and page count — keep it for your records.
Scan Tips for Cleaner Faxes
Use good lighting and hold your iPhone parallel to the document — not at an angle. Faxes are transmitted in black and white at 200 DPI, so high-contrast originals (dark ink on white paper) will always produce the best results.
What to Look for in an iPhone Fax App
Not all iPhone fax apps are equal. Before downloading, evaluate these six factors:
- ✓Delivery reliability: Look for a stated delivery success rate. mFax publishes 98%. An unreliable app is useless — your fax either arrives or it doesn't.
- ✓Transparent pricing: Many fax apps display a "free" badge but charge $9.99/week the moment you open them. Avoid apps with weekly subscription traps. Read App Store reviews carefully.
- ✓Document scanning quality: Built-in camera scanning is table stakes. Test whether the app auto-detects page edges and produces clean, high-contrast output — not just a photo of your document.
- ✓Confirmation receipts: You should receive a timestamped delivery confirmation for every fax. This is legally useful for contracts, tax submissions, and medical referrals.
- ✓HIPAA compliance (if needed): Sending medical records, patient data, or insurance claims? The app must offer a signed Business Associate Agreement (BAA). Not all apps provide this — check before you send.
- ✓Receiving faxes: If you need to receive faxes (not just send), you need a virtual fax number. Confirm the app provides this and whether it's included or an add-on cost.
Watch Out for Weekly Subscription Traps
Some iPhone fax apps in the App Store default to expensive weekly billing — $9.99/week works out to over $500/year. Always check the subscription terms before creating an account. mFax and Fax.Plus both offer straightforward per-page or monthly pricing with no hidden weekly fees.
Which iPhone Fax App Is Right for You?
| Use Case | Best App | Why |
|---|---|---|
| Occasional personal faxing (taxes, forms, one-off docs) | mFax | Pay per fax, no subscription, fast and reliable |
| Free faxing under 100 pages/month | Fax.Plus | Most generous free tier of any major app |
| Healthcare / HIPAA documents | mFax Business or iFax | Both offer BAA and encrypted transmission |
| Business team with dedicated fax number | mFax Business or eFax | Team accounts, web dashboard, permanent number |
| Absolute minimum spend (< 5 faxes/year) | FaxBurner | Genuinely free for very light use |
| International faxing | mFax | Supports 100+ countries with clear per-page pricing |
For most people, mFax covers every scenario. The pay-per-fax model means you're never paying a monthly fee for an app you use twice a year. And if your needs grow — virtual number, team accounts, compliance — upgrading to mFax Business takes one click.
More iPhone Fax Guides
Looking to go deeper? These guides cover related topics:
- How to Fax from iPhone: 3 Methods That Actually Work — including the no-app browser method
- How to Fax from iPhone Without an App — fax directly from Safari
- Scan and Fax from iPhone — turn paper documents into faxes in seconds
- Best Fax Apps for iPad — if you're working from a tablet
- Top 7 iPhone Fax Apps Reviewed — in-depth app-by-app reviews with test results
Send Your Fax Now
An iPhone fax app eliminates every friction point of traditional faxing: no machine, no store trip, no $3-per-page fees. The best one gets out of your way and just delivers.
Download mFax from the App Store, upload your document, and your fax is sent in under 2 minutes. Over 5 million users already have.
For business teams, mFax Business adds a dedicated virtual fax number, HIPAA compliance, and team accounts — from about $9/mo. Build your own plan around the seats and pages you actually use, with no fixed tiers.