BillFighter: Medical Bill Help
Dispute debt, appeal denials
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Medical bills are written to be paid, not understood. BillFighter reads every line and shows you what looks wrong, in plain English — then writes the letter.
Your bill may be wrong. Make them prove it.
Medical bills are hard to read, and that is not an accident. A charge billed twice. A visit coded higher than the visit you actually had. A "supplies — misc" line that names nothing. Most people pay anyway, because arguing means phone calls, hold music, and not knowing what to say.
BillFighter reads every line of your bill and shows you what looks wrong and what is worth asking about, in plain English. Then it writes the letter.
HOW IT WORKS
1. Point your camera at the bill. A photo or a PDF works — a medical bill, an explanation of benefits, a denial, or a collection notice.
2. We read it and point out what looks wrong, what is missing, and what is worth asking about.
3. You pick the letter. We write it from your bill. Print and mail it yourself, or have us send it by certified mail.
SCAN FREE, BEFORE YOU MAKE AN ACCOUNT
Three free scans a month. Read the findings first. Make an account only when you want to keep the case. No card to start.
ONE PRICE PER BILL. NO SUBSCRIPTION.
• Free Scan — the findings, the letter we would send first, and a sample letter to read.
• Fight Kit, $39 once for that bill — your letters written from your bill, up to three, yours to print and mail from your phone.
• In Your Corner, from $99 once for that bill — everything in the Fight Kit, plus up to two approved letters we mail by certified mail and track for you.
You keep 100% of anything you win. We never take a percentage of it.
WHAT THE LETTERS ASK FOR
• An itemized bill — every charge, its code, and its date, in writing.
• Financial assistance — nonprofit hospitals are required to have a program, and you apply for it in writing.
• A correction, where a charge looks duplicated, coded too high, or unexplained.
• Validation — but only when the letter is going to a debt collector rather than to the hospital.
ABOUT THE LAW, PLAINLY
The Fair Debt Collection Practices Act applies to third-party debt collectors. It does not apply to the hospital that treated you. After you receive the required validation notice from a collector, you generally have 30 days to dispute in writing, and a covered collector who receives your written dispute in time must pause collection of that amount until it mails you verification.
A hospital has no legal deadline to answer your letter. That is why our letters set your own follow-up date, and why we remind you when it arrives.
Where the No Surprises Act applies, protected out-of-network services are generally limited to your in-network cost sharing.
WHAT WE ARE NOT
BillFighter is not a law firm and does not give legal advice. You are the person writing to your provider or collector — the letter goes out over your name, and you decide what to send.
Our analysis is automated. It can make mistakes. Read every finding before you send anything, and skip any question you are not sure about. There is an "I don't know" button for exactly that.
Questions? There is an "Ask a real person" box in the app. A real person answers by email. We are not lawyers and cannot give legal advice, but we will answer.
Terms of Service: https://billfighter.com/terms
Privacy Policy: https://billfighter.com/privacy
New pricing, and it is simpler.
One price per bill instead of a subscription. Scan free, and pay only when you want the letters.
• Free Scan — the findings and a recommended letter, at no cost.
• Fight Kit, $39 once for that bill — your letters, up to three, yours to print and mail.
• In Your Corner — everything in the Fight Kit, plus up to two approved letters we mail by certified mail and track for you.
Also in this version:
• Print or save a letter straight from your phone. No computer needed.
• "Use this letter" — choose a letter when you are ready, and see how many you have left before you do.
• Your mailing address now lives in Settings and goes on the letter as the return address.
• "Ask a real person" from the FAQ and Settings screens. A person answers by email.
• Any question we ask now has an "I don't know" button. A guess can weaken your letter, so we would rather you skip it.
• Plainer wording throughout, and corrected explanations of the law. The Fair Debt Collection Practices Act applies to debt collectors, not to the hospital that treated you, and no law gives a hospital a deadline to answer.
The developer, ALI LIN MILLER, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Financial Info
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- AAA Incubator, LLC
- Size
- 36.7 MB
- Category
- Finance
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- BillFighter Pro $24.99
- Extra Letter $15.00
- Fight Kit $39.00
- BillFighter Plus $12.99
- BillFighter Pro Yearly $149.99
- Additional Certified Mail Send $9.99
- Additional Certified Mail Send $4.99
- BillFighter Pro $19.99
- Copyright
- © 2026 AAA Incubator, LLC