# Sifter vs 短信狗卫士

The clearest difference is review sentiment: 短信狗卫士 at 100% against Sifter's 29%. 短信狗卫士 also leads on rating (5.0 vs 4.1) and update cadence (every 5 days vs every 3 months). Sifter's advantage is ratings volume (113 vs 1). On ads, in-app purchases and device support there is nothing between them.

Sifter costs $2.99 and 短信狗卫士 $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

短信狗卫士 holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Sifter has 113 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 29% of Sifter's written reviews are positive against 100% of 短信狗卫士's.

Sifter ships an update every 3 months, 短信狗卫士 every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Sifter | 短信狗卫士 |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| Rating | [4.1 (113 ratings)](https://appshunter.io/ios/app/sifter-spam-sms-filter/id1265348258/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6447949251/reviews)** |
| Number of ratings | **113** | 1 |
| Positive reviews | 28.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Paid | — |
| Size | 10 MB | 9 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [磊 汪](https://appshunter.io/developer/1063627762) | [珍珍 张](https://appshunter.io/developer/1607946529) |

## What reviewers say

### Sifter

[App page](https://appshunter.io/ios/app/sifter-spam-sms-filter/id1265348258)

This app provides a smart spam filter for iOS devices, allowing users to create personalized rules to block unwanted text messages. It prioritizes user privacy with local processing and offers advanced filtering options like regular expressions.

**Highlights:** Customizable filtering rules, Blacklist and whitelist contacts, Regex filtering for advanced control, Local data processing for privacy, Blocks unwanted SMS and MMS

**In-app purchases:** none


### 短信狗卫士

[App page](https://appshunter.io/ios/app/id6447949251)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sifter free?

Sifter costs $2.99, with no in-app purchases.

### Is 短信狗卫士 free?

短信狗卫士 costs $0.99, with no in-app purchases.

### Which has better reviews, Sifter or 短信狗卫士?

短信狗卫士 is rated higher. Sifter averages 4.1 out of 5 from 113 ratings, while 短信狗卫士 averages 5.0 from 1 ratings.

### Do Sifter or 短信狗卫士 have ads?

Neither Sifter nor 短信狗卫士 shows ads.

### Which is updated more often, Sifter or 短信狗卫士?

Sifter ships an update every 3 months, and 短信狗卫士 every 5 days. Most recently, Sifter was updated on October 24, 2026 and 短信狗卫士 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.*