# Spam Text Blocker & Filter vs PrefixBlock

The clearest difference is update cadence: PrefixBlock at weekly against Spam Text Blocker & Filter's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Spam Text Blocker & Filter sells 4 in-app purchases, starting at $2.99 per 7 days and PrefixBlock sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Spam Text Blocker & Filter ships an update every 3 months, PrefixBlock weekly. The most recent releases landed on November 5, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Spam Text Blocker & Filter | PrefixBlock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 19 MB | 4 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | +4 | 4+ |
| Developer | [MUHAMMET USLU](https://appshunter.io/developer/1864979364) | [Phung Doanh](https://appshunter.io/developer/965062916) |

## What reviewers say

### Spam Text Blocker & Filter

[App page](https://appshunter.io/ios/app/spam-text-blocker-and-filter/id6790678596)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $2.99 | per 7 days |
| Yearly Pro | $44.99 | per year |
| Tip | $4.99 | one-time |
| Lifetime Pro | $79.99 | one-time |


### PrefixBlock

[App page](https://appshunter.io/ios/app/prefixblock-spam-call-filter/id6800204952)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chặn đầu số pro tháng | $0.99 | per month |
| Chặn đầu số pro năm | $4.99 | per year |
| Chặn đầu số trọn đời | $9.99 | one-time |


## Frequently asked questions

### Is Spam Text Blocker & Filter free?

Spam Text Blocker & Filter is free to download, with in-app purchases available.

### Is PrefixBlock free?

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

### Do Spam Text Blocker & Filter or PrefixBlock have ads?

Neither Spam Text Blocker & Filter nor PrefixBlock shows ads.

### Which is updated more often, Spam Text Blocker & Filter or PrefixBlock?

Spam Text Blocker & Filter ships an update every 3 months, and PrefixBlock weekly. Most recently, Spam Text Blocker & Filter was updated on November 5, 2026 and PrefixBlock on November 8, 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.*