SMS Shield

SMS Shield

SMS Spam Filter

138 ratings
84 reviews
Free
In-App Purchases

Details

Released
September 19, 2017
Updated
November 3, 2026

Features

SMS Shield screenshot #1 for iPhone
SMS Shield screenshot #2 for iPhone
SMS Shield screenshot #3 for iPhone
SMS Shield screenshot #4 for iPhone
SMS Shield screenshot #5 for iPhone
SMS Shield screenshot #6 for iPhone
iphone
iphoneDuo
ipad
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About

This app uses machine learning to automatically filter unwanted SMS messages like promotions, phishing attempts, and scam texts. It also offers a unique mode for frequent travelers to block carrier messages and allows users to create custom block lists for specific numbers or keywords. All filtering is done offline, ensuring 100% privacy.

✓Automatic spam filtering
✓Frequent traveler mode
✓Custom block list
✓Offline filtering for 100% privacy
✓Multi-lingual spam detection
✓Machine learning based identification
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What users say about SMS Shield

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What's New in SMS Shield

2.0.1

November 3, 2026

SMS Shield 2.0 is rebuilt from the ground up. FIXED • Filtering could stop for members even though their membership was active • Numbers didn't match when written differently, for example with or without the country code • Blocked words weren't checked against the sender's name • Reported messages didn't always reach us • The filter no longer depends on iCloud • Asking for a new language opened an empty email • Testing a message could show a different result from Messages NEW • Designed for iPhone Duo and iPad • SMS Shield AI models retrained and updated • New SMS Shield AI model for Spanish • See what SMS Shield AI knows in each language: words, version and when it was trained • Block whole area codes and number ranges, like 705* • Block texts sent from email addresses, or from every address at a domain like @outlook.com • Block sender names, like AD-PROMO • Allow List for senders and words, which always wins • Verification codes and bank alerts are never sent to Junk, and can be sorted into Transactions • Test Filter shows where a text would go, and why • Pause filtering for an hour, until tomorrow morning, or until you turn it back on • Report a message: numbers, codes and email addresses are removed first, and you see what's sent • New setup guide for iOS 18 and later • Now also in German, Spanish, French and Turkish Your lists and membership carry over.

More
3

Subscriptions & In-App Purchases

Classic

1 Month SMS spam protection for your iPhone

$0.991 Month
7 Days trial
How to cancel SMS Shield subscription ⁉️

Events

Read more about SMS Shield 2.0

SMS Shield 2.0

Rebuilt from the ground up, with new AI

Nov 3, 2026 — Dec 4, 2026

User reviews

Fails to filter - don’t waste your money

Does not filter area codes or keywords as you would expect. Actually I don’t know what it does as there is NO reporting to see what it has done. Political spam continues…

Response from developer

Thanks for the detailed feedback. We just released a big update: you can now block an area code (add 705* to your Custom Block List), and Test Filter shows exactly where a text would go and why. iOS doesn't let filters keep a record of what they've sorted, but filtered texts are in Junk in Messages.

Doesn’t work

Failed to filter out obvious scam gambling texts

Response from developer

Sorry about that. We just released a big update, and SMS Shield now works as it should. You can also block any word or sender on your Custom Block List, and Test Filter shows where a text would go.

SMS shield

Love it needs to be more blocking of sms scams I still get them

Response from developer

Thanks for telling us. We just released a big update with new SMS Shield AI, which now sends spam and scam texts to Junk on its own. You can also block any word or sender on your Custom Block List.

Works ok.

Not good at fixing texts that even flagged as non spam. Keeps sending them to junk folder.

Manual

This is a sham; YOU have to catch the spam & add it to your (their) database manually. So you are paying this app to build their database and YOU get no automated blocking at all. CROOKS

Developer apps

User experience

🐞

Reported Bugs

14 issues

Filters out legitimate texts

Bug

Doesn't block known spam

Bug

Requires manual input for blocking

Bug

No response from support

Bug

Doesn't block SMS from email

Bug

Machine learning is ineffective

Bug

App still filtering after cancellation

Bug

App doesn't work after iOS update

Bug

Keywords not being blocked

Bug

False positives (blocking important messages)

Bug

Cannot cancel subscription in-app

Bug

App asks for sensitive permissions

Bug

Free trial doesn't work as advertised

Bug

Fails to modify records when classifying SMS

Bug
✨

Requested Features

6 requests

More blocking of SMS scams

Feature

Option to mark SMS as spam or not spam

Feature

Ability to whitelist keywords

Feature

Better machine learning/training

Feature

Improved support responsiveness

Feature

One-time purchase option

Feature

FAQ

Does SMS Shield have ads?

SMS Shield is ad-free. The app is free to download and use, with optional subscription plans available for enhanced features.

What are the subscription options for SMS Shield?

SMS Shield offers three subscription tiers: Classic for 1 month, Silver for 6 months, and Gold for 1 year. All subscriptions include a 7-day free trial.

How does SMS Shield ensure user privacy?

SMS Shield guarantees 100% privacy by performing all SMS filtering offline, directly on your device. This means your text messages are never sent to external servers for processing.

What languages does SMS Shield support for spam detection?

SMS Shield currently detects spam in English, Spanish, Portuguese (Brazil), Italian, Swedish, and Arabic. Users can request additional language support via email.

Can I block specific numbers or keywords with SMS Shield?

Yes, SMS Shield includes a custom block list feature that allows you to block SMS messages from specific phone numbers or those containing particular keywords.

What is the Frequent Traveler Mode in SMS Shield?

Frequent Traveler Mode is an innovative feature designed to block annoying SMS messages sent by mobile operators when you visit other countries, such as welcome messages.

What is the update frequency for SMS Shield?

SMS Shield was last updated on November 3, 2026, indicating a recent update. The latest version is 2.0.1.

What is the user sentiment for SMS Shield?

The overall user sentiment for SMS Shield is negative, with a rating of 3.2 stars from 138 ratings. Common complaints include the filter not working effectively for many users and legitimate texts being blocked.