Spam Text Blocker App Pricing: What a Text Blocker for iPhone or an Android Message Blocker Costs

Search for a spam text blocker and you will be sold an app within two clicks. Before you buy one, it is worth knowing that the two most effective text filters in the United States are already installed on your phone, cost nothing, and are switched on with two taps each. What a paid app adds on top is real but narrow, and one of the two best-known vendors will not tell you what it costs until you have started signing up.

Every figure below was read on 25 August 2026 from the company's own website or support documentation. No review roundups, no affiliate pages, no estimates. Where a company declines to publish a price, that is stated rather than filled in.

What a spam text blocker app costs, and what filters texts for free

The table is the whole argument. Sort the market by whether a product actually filters text messages and most of the paid options fall out immediately, because they were built for voice calls and were never extended to SMS.

Swipe the table sideways to see every column.

Start with the two free layers, because a paid app sits on top of them anyway

On iPhone this is two switches on one screen. Open Messages, tap the Filters button at the top of the conversation list, tap Manage Filtering, scroll to Unknown Senders and turn on Screen Unknown Senders. While you are there, tap Text Message Filter and turn that on too. The first moves anything from a sender you have never interacted with into a separate filter. The second sorts SMS, MMS and RCS messages into Transactions and Promotions folders.

Apple changed the naming and the default in iOS 26, which is why so much of the advice online sends you looking for a setting called Filter Unknown Senders that is no longer there. The switch is now called Screen Unknown Senders and it ships off. The exception is an upgrade from iOS 18 with the old setting already enabled, in which case Apple carries your choice forward.

On Android the equivalent is on by default, so this is a check rather than a setup. Tap your profile picture in Google Messages, then Messages settings, then Protection and Safety, then Spam protection. Google notifies you when it switches this on and notes the option only appears if your device supports it. The detection models run on the device, which is why it keeps working with no signal, and any link in a message is checked against Google's servers to see whether it is malicious.

Both of these are free forever and neither has an upsell attached. If a paid blocker is worth buying, it has to be worth buying in addition to them, not instead of them, because a third-party app on iPhone plugs into the same Text Message Filter extension slot Apple built.

Nomorobo publishes its prices. RoboKiller does not.

Nomorobo's pricing page lists three tiers in plain numbers: $2.99 a month or $19.99 a year for the mobile app, which the site labels a 45 percent saving, $59.99 a year for Nomorobo Max, and $79.99 a year for a family plan covering up to four devices. Spam text filtering and phishing protection are listed as included features rather than an add-on, and all mobile plans come with a free trial. The company also states it does not access your call logs, which is a claim worth having in writing in this category.

RoboKiller's pricing page is a different experience. As of 25 August 2026 it carries a headline claiming the app blocks 99 percent of spam calls and texts, a wall of testimonials, an audio player of prank recordings and a Try it free button. What it does not carry is a plan name or a dollar figure anywhere on the page. To find out what you would pay, you have to begin a signup. That was true when we last checked this in August and it is still true now.

This is not a small thing when you are comparing two products in the same aisle. A subscription you cannot price without handing over an email address is one you cannot compare, and the burden of that sits with the vendor, not with you. Nomorobo is the cheaper option to evaluate for the simple reason that it lets you evaluate it.

Two of the three carriers do not filter your texts at all

The carrier layer is where most people's assumptions are wrong, and the names are partly to blame. T-Mobile is the one doing the most: it has run an anti-spam system for SMS, MMS and RCS on the network since 2014, at no additional charge, updated with new spam fingerprints and signatures, and it checks every message against that system before delivering it.

Verizon sells Call Filter, and Call Filter Plus at $3.99 a month, and neither touches your text messages. What Verizon gives you for texts is a block list in My Verizon holding up to five numbers, free, which expires after 90 days. Verizon Family raises that to 20 permanent blocks. Against a campaign rotating through hundreds of numbers, a five-slot expiring block list is not a defense. The full breakdown of what Call Filter does cover is worth reading if you assumed the name included messages.

AT&T is the most straightforward of the three, because it simply tells you. Its own support documentation states that the ActiveArmor app does not filter spam text messages and directs you to the Apple and Google settings above. Paying $7 a month for ActiveArmor advanced does not change that; the advanced tier is mostly identity monitoring.

One thing all three do accept, free, is 7726. Forward a spam text to that short code, which spells SPAM on the keypad, and reply with the sender number when prompted. Verizon and T-Mobile both confirm there is no charge, T-Mobile texts back a confirmation, and the FTC recommends it because it is how a campaign gets fingerprinted and blocked at the network for everyone rather than just hidden from you.

Who should actually pay for a text blocker

A paid app earns its money in a narrow set of cases. If you are on Verizon or AT&T, the network is doing less for your messages than T-Mobile's is, so a third-party database of known spam senders fills a real gap. If you are getting phishing texts rather than marketing ones, a vendor maintaining a live threat database will catch new campaigns faster than a generic unknown-sender filter will. And if you want call and text protection from one subscription rather than juggling carrier apps, buying both together is reasonable.

The case against is just as concrete. If you are on T-Mobile, with Screen Unknown Senders on and the Text Message Filter running, you are already three layers deep and a fourth filter has diminishing returns. And if the specific complaint is that you get too many texts rather than that dangerous ones get through, no subscription addresses it, because every product in the table acts after the message has been sent and paid for.

There is one group that should be careful with aggressive filtering, and it is business owners. Screen Unknown Senders is keyed to whether you have interacted with a sender before, so it catches exactly the messages a small business needs: a first message from a new customer, a contractor texting from a number you have not saved, a supplier confirming a delivery. If your operation depends on payment reminders that go out by text and on customers replying to them, filtering everything unknown is the wrong default. Use the notification categories instead: leave Time Sensitive and Personal on, switch Promotions off, and you keep the messages that pay the bills while losing the casino promotions.

The thing none of them fix

Every product in the table, free or paid, network-level or on-device, does the same job: it decides whether a message that has already been sent reaches your screen. Not one of them changes the number of messages sent. Sending a text costs a fraction of a cent, so a campaign filtered by 95 percent of its recipients is still profitable and still runs.

The volume is set upstream, by how many marketing files, lead lists and people-search profiles carry your phone number and how easy they are to buy. That is also why the texts keep arriving from different numbers after you have blocked a dozen: blocking removes one line from one sender's rotation while your row stays in the file being resold. A text that opens with your first name is the clearest tell, because a name and a number sitting together came from an enriched list, and enrichment almost always traces back to a published profile.

The order that works is free-first: report to 7726, turn on the filters your phone already has, register on the National Do Not Call Registry, which the FCC has confirmed covers text messages and not just calls, and then start taking the listings down. The full setup walkthrough is in how to stop spam texts, and the removal side is covered in how to remove your phone number from the internet. Buy the subscription if it fits one of the cases above. Just do not expect it to make your phone quieter, because that is not what any of them are selling.