Spam Call Blocker for iPhone: RoboKiller vs Nomorobo Pricing, and the Free Carrier Apps

Every spam call blocker sells the same promise, so the only honest way to compare them is on what each company is willing to put in writing. We checked both major iPhone blockers on 21 August 2026, and the first difference showed up before any feature comparison: one of them publishes a price list, and the other one does not.

That matters more than it sounds. A subscription you cannot price without handing over an email address is a subscription whose price can move, and this category has a history of it. Below is what each vendor publishes, what the free layers already give you, and the one thing no blocker on this page can do.

What does a spam call blocker actually do?

It filters calls after they have been dialed. A blocking app registers itself with iOS as a call directory extension, compares each incoming number against a database, and either blocks the call, silences it, or labels it on your screen. The database is built from numbers other users reported, from carrier data, and from complaint feeds. The FTC describes the mechanism plainly: the company behind the app uses call data or reports from users, the FTC and other sources to predict which calls are illegal or likely scams, and the app intercepts those calls before they reach you.

Two consequences follow from that design and both are worth understanding before you pay. A blocker is always slightly behind, because a number has to be reported before it can be blocked, and a spam operation cycling through fresh numbers gets a clean run every time. And a blocker can be wrong in the expensive direction: the FTC warns that call-blocking services might block some calls you want to get. Your pharmacy, a delivery driver, a doctor's office calling from an unlisted line.

RoboKiller vs Nomorobo pricing, checked 21 August 2026

Prices below are read directly off each company's own site on 21 August 2026. Where a company does not publish a figure, the table says so rather than guessing, because third-party roundups of this category disagree with each other by a factor of four and none of them is the vendor.

A vendor declining to publish a price is not proof of anything by itself. It is, however, the one variable you can check in ten seconds and the one that predicts renewal surprises. If a company will tell you the number before it has your card details, that is worth something.

Do you need a paid spam blocker at all?

Start with the two free layers, because between them they cover most of what people buy a subscription for, and you can have both switched on in five minutes. Apple's own screening lets you silence every number that is not in your Contacts, or ask unsaved callers to state their reason before your phone rings. The carrier layer stops the calls the network has already scored as fraud. The full setup is in how to stop spam calls on iPhone, including the exact setting names and the three caveats Apple attaches to them.

Pay for an app when the free layers leave a specific gap you can name. The common ones are genuine: you need calls from unsaved numbers to still ring because of work, so blanket silencing is not an option and you want per-number filtering instead. Or you want blocking by area code. Or you want a record of what was blocked. Those are real features and worth $20 a year. Paying because the phone still rings sometimes is not, because it will keep ringing sometimes.

What no spam call blocker for iPhone can do

None of them reduce how many spam calls are placed to your number. Every option in the table is a filter applied at the moment a call arrives, which means the call was already dialed, already paid for by the caller, and already counted as a live number on somebody's list. Cancel the subscription and the original volume is still there, unchanged, waiting.

Call volume is a function of how many places your phone number is published. People-search sites list names, ages, addresses, relatives and phone numbers scraped from public records and commercial sources. Lead generators resell contact lists by the thousand. Every additional listing is another supplier feeding another caller, which is why the volume tends to step up after a mortgage application or a quote form rather than drift. The specific triggers are covered in why you keep getting spam calls.

The two free federal-level steps do more about supply than any app does. Registering on the National Do Not Call Registry is permanent, costs nothing, and legally binds every telemarketer who follows the rules, though the FTC is candid that scammers ignore it. Removing the listings themselves is the slower half, and the working forms are collected in the data broker opt-out list. If you would rather not hand your real number to the next form that asks for one, giving out a second cloud phone number instead of your personal line keeps the new listings from pointing anywhere that matters.

Is RoboKiller worth it compared to Nomorobo?

On the evidence each company publishes, Nomorobo is the easier one to recommend, because you can see what it costs before you commit and $19.99 a year is a small enough number that being wrong is cheap. RoboKiller may well be the better product, and it has the larger reputation, but it asks you to enter a signup flow to find out the price, and that is a genuine mark against it in a category where renewal pricing has been contentious.

The more useful comparison is not between the two apps. It is between paying either of them roughly $20 to $60 a year to filter calls forever, and spending that effort once on the listings that generate the calls. Filtering is a subscription that never ends because the underlying problem never changes. Removal is finite work against a finite list of sites.

How to choose a spam blocker app in five minutes

Turn on Apple's screening and your carrier's free scam blocking first, then live with it for two weeks. Most people stop there. If you still have a specific complaint after those two weeks, write it down in one sentence, then check whether a paid app solves that exact sentence rather than the general feeling that your phone rings too much.

When you do compare apps, three things are worth checking and none of them is the marketing copy. Does the vendor publish its price on its own site. Does the privacy policy explain what happens to your contacts, since the FTC notes some blocking apps request access to them. And can you cancel from the App Store subscription screen without contacting anyone, which for iOS subscriptions you generally can.

Finally, report what gets through. The FTC asks you to hang up without pressing any number and without calling back, then report the call at DoNotCall.gov, or at ReportFraud.ftc.gov if you lost money. Those reports feed the same databases the blockers buy from, so reporting is the one free action that makes every product on this page slightly better for everyone.

Sources

Nomorobo pricing read from nomorobo.com/pricing on 21 August 2026. RoboKiller pricing page checked the same day. Scam ID and Scam Block details from T-Mobile's own Scam Shield pages. Call blocking mechanics, the warning about wanted calls being blocked, the note on contacts access, and the reporting instructions are from the FTC's consumer article "How To Block Unwanted Calls" and its consumer alert "Five ways to help you cut down on unwanted calls", published 21 August 2025. Prices change: check the vendor before you buy.