# Sifter vs BookWeeks

The clearest difference is price: BookWeeks at Free against Sifter's $2.99. BookWeeks also leads on update cadence (every 5 days vs every 3 months) and iOS requirement (13.0 vs 17.0). Sifter's advantage is chart position (#172 vs unranked). On ads, in-app purchases and device support there is nothing between them.

BookWeeks is free to download; Sifter costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sifter ships an update every 3 months, BookWeeks every 5 days. The most recent releases landed on September 17, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Sifter | BookWeeks |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.1 (108 ratings)](https://appshunter.io/ios/app/sifter-spam-sms-filter/id1265348258/reviews)** | — |
| Number of ratings | **108** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Paid | — |
| Best chart rank | **#172** | — |
| Size | 10 MB | 25 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [磊 汪](https://appshunter.io/developer/1063627762) | [OI FUNG HO](https://appshunter.io/developer/1861706104) |

## What reviewers say

### Sifter

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

**Currently charting:** #172 Top Paid · Utilities (US App Store)

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

**Features:** Vision Pro support

**In-app purchases:** none


### BookWeeks

[App page](https://appshunter.io/ios/app/bookweeks/id6757269339)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sifter free?

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

### Is BookWeeks free?

BookWeeks is free to download, with no in-app purchases.

### Do Sifter or BookWeeks have ads?

Neither Sifter nor BookWeeks shows ads.

### Which is updated more often, Sifter or BookWeeks?

Sifter ships an update every 3 months, and BookWeeks every 5 days. Most recently, Sifter was updated on September 17, 2026 and BookWeeks on September 7, 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.*