Block spam SMS and unwanted messages
The SMS spam filter app for iPhone — unlimited custom filters, privacy-first, free to download.
Available on the App Store:
- ✓ Free to download
- ✓ 1 month free trial
- ✓ No data collected
- ✓ Unlimited custom filters
- ✓ Privacy-first
- ✓ iCloud sync
Complete protection against spam
SMS Filter automatically filters unwanted text messages before they ever reach your inbox.
Block spam SMS and junk messages
Create unlimited custom SMS filters based on sender, phone number, number ranges, keywords, or message content.
Unwanted messages arrive silently, without notifications. Your filters sync via iCloud across all your Apple devices.
Protect yourself from SMS scams and phishing
Detect and block fraudulent SMS, scams, phishing attempts, and other threats before they reach your inbox.
The app uses regularly updated lists of known fraudulent keywords and senders to stay ahead of spammers.
Keep your inbox organized with folders
Transactions, promotions, one-time codes, reminders… SMS Filter automatically sorts messages into folders and subfolders as they arrive.
Find important SMS instantly in a clean, distraction-free inbox.
Set up your SMS spam filter in 3 steps
Download the app from the App Store
Install SMS Filter for free from the App Store. Available on iPhone.
Enable SMS filtering in iPhone Settings
Go to Settings → Messages → Unknown & Spam and select SMS Filter. Takes less than a minute.
Set up your custom spam filters
Define your own filtering rules by keyword, number, or sender. Spam SMS are blocked automatically, without any action needed from you.
Frequently asked questions
Everything you need to know about blocking spam SMS on iPhone
How do I stop spam SMS on iPhone?
On iPhone, you can stop spam SMS using the SMS Filter app. After installing, enable the filter in Settings → Messages → Unknown & Spam, then select SMS Filter. The app automatically filters spam, scams, and unwanted messages. You can also create custom filters by keyword, phone number, or sender for more precise blocking.
What is smishing?
Smishing is SMS phishing — a scam where fraudsters send text messages impersonating banks, delivery services, or government agencies to trick you into clicking a malicious link or revealing personal information. SMS Filter can automatically detect and block known smishing attempts before they reach your inbox.
Why am I getting so many spam texts?
Spam texts have surged in recent years. Your number may have been sold by a data broker, leaked in a data breach, or harvested from a website. Scammers also use automated systems to blast millions of numbers at random. SMS Filter blocks spam texts before they reach your inbox and lets you create custom rules to stop recurring senders.
Is SMS Filter free to download?
Yes, SMS Filter is free to download on the App Store and includes a 1-month free trial of all features. After the trial, full access requires a subscription or a one-time lifetime purchase, available directly from within the app.
How does the SMS spam folder work?
SMS Filter automatically sorts your messages into dedicated folders: a Junk folder for spam and unwanted SMS, and customizable subfolders (Transactions, Promotions, One-time codes, Reminders, etc.). Filtered messages arrive silently in the right folder, without notifications, so you're never distracted. You can still access them at any time.
Can I create custom SMS filters?
Absolutely. You can add unlimited custom filters: by keyword, phone number, number range, sender email address, or specific content (such as links). For advanced use cases, you can also write regex rules to match complex patterns in message content. You decide what gets blocked and what gets sorted into a specific folder or subfolder.
How do I block all SMS from a number?
To block all SMS from a specific number, open the Junk folder in the app, add a filter, choose the Senders option, and enter the number. You can also block an entire range of numbers — useful for short codes.
Are my SMS filters saved when I switch iPhone?
Yes. Thanks to iCloud sync, all your filters and settings are automatically backed up and restored on your other Apple devices. No need to reconfigure everything when you get a new iPhone.
Does the app protect my message privacy?
Absolutely. SMS Filter analyzes messages locally on your device, securely and privately, only to compare them against the filters you've defined. No personal data, no message content, and no sender information is ever collected or sent to external servers.
Stop spam SMS for good
Download SMS Filter free — 1-month free trial included, no commitment required.