# SMS Shield vs Spam Killer

The clearest difference is rating: Spam Killer at 4.4 against SMS Shield's 3.2. Spam Killer also leads on monetization model (free with in-app purchases vs subscription) and review sentiment (50% vs 17%). SMS Shield's advantage is ratings volume (138 vs 16) and iOS requirement (11.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SMS Shield sells 3 in-app purchases, starting at $0.99 per month and Spam Killer sells 5 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Spam Killer holds the better App Store score, 4.4 against 3.2. That said, the two scores are not equally well evidenced: SMS Shield has 138 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 17% of SMS Shield's written reviews are positive against 50% of Spam Killer's.

SMS Shield ships an update fortnightly, Spam Killer every 2 days. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SMS Shield | Spam Killer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (138 ratings)](https://appshunter.io/ios/app/sms-shield/id1248198400/reviews) | **[4.4 (16 ratings)](https://appshunter.io/ios/app/spam-killer-scam-text-blocker/id6745466973/reviews)** |
| Number of ratings | **138** | 16 |
| Positive reviews | 16.7% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 15 MB | 19 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Taphive GmbH](https://appshunter.io/developer/466416247) | [Jalm Studio Inc](https://appshunter.io/developer/1882690243) |

## What reviewers say

### SMS Shield

[App page](https://appshunter.io/ios/app/sms-shield/id1248198400)

This app uses machine learning to automatically filter unwanted SMS messages, including promotions, phishing attempts, and scam texts. It offers features like a frequent traveler mode to block international carrier messages and a custom block list for specific numbers or keywords. All filtering is done offline, ensuring 100% privacy.

**Highlights:** Automatic spam filtering, Frequent traveler mode, Custom block list, Offline filtering, Multi-lingual spam detection

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Classic | $0.99 | per month |
| Silver | $3.99 | per 6 months |
| Gold | $8.49 | per year |

**What reviewers like**

- 👍 Works well for some users
- 👍 Filters spam effectively for some
- 👍 Good for blocking specific keywords for some
- 👍 Worth the price for some users
- 👍 Privacy-focused (messages stay on device)

**What reviewers complain about**

- 🐛 Doesn't work for many users
- 🐛 Fails to filter obvious scams
- 🐛 Still receives spam texts
- 🐛 Sends legitimate texts to junk
- 🐛 Requires manual spam addition

**Reported bugs**

- Filters out legitimate texts
- Doesn't block known spam
- Requires manual input for blocking
- No response from support
- Doesn't block SMS from email

**Requested features**

- More blocking of SMS scams
- Option to mark SMS as spam or not spam
- Ability to whitelist keywords
- Better machine learning/training
- Improved support responsiveness


### Spam Killer

[App page](https://appshunter.io/ios/app/spam-killer-scam-text-blocker/id6745466973)

Automatically filters unwanted SMS messages, blocks suspicious numbers, and detects scam texts using AI. Customize filters and whitelist important senders for a clean inbox.

**Highlights:** Blocks 99% of spam texts, Detects scams and phishing links, Customizable filters, AI-based spam detection, Whitelists important senders, Simple setup

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 week | $3.99 | per 7 days |
| One Week Premium Protection | $5.99 | per 7 days |
| 3 months | $14.99 | per 3 months |
| Three Months Premium | $19.99 | per 3 months |
| Year of SpamKiller Pro | $39.99 | per year |


## Frequently asked questions

### Is SMS Shield free?

SMS Shield is free to download, with in-app purchases available.

### Is Spam Killer free?

Spam Killer is free to download, with in-app purchases available.

### Which has better reviews, SMS Shield or Spam Killer?

Spam Killer is rated higher. SMS Shield averages 3.2 out of 5 from 138 ratings, while Spam Killer averages 4.4 from 16 ratings.

### Do SMS Shield or Spam Killer have ads?

Neither SMS Shield nor Spam Killer shows ads.

### Which is updated more often, SMS Shield or Spam Killer?

SMS Shield ships an update fortnightly, and Spam Killer every 2 days. Most recently, SMS Shield was updated on October 29, 2026 and Spam Killer on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*