# Smart Spam Filter vs Appknot Trace

The clearest difference is in-app purchases: Appknot Trace at none against Smart Spam Filter's 2. Appknot Trace also leads on update cadence (every 2 days vs every 2 weeks). Smart Spam Filter's advantage is iOS requirement (16.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Smart Spam Filter sells 2 in-app purchases, starting at $2.99 per month. Appknot Trace asks for nothing beyond the download.

Smart Spam Filter ships an update every 2 weeks, Appknot Trace every 2 days. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Smart Spam Filter | Appknot Trace |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (9 ratings)](https://appshunter.io/ios/app/smart-spam-filter/id6503603784/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 98.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 23 MB | 2 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Junbum Lee](https://appshunter.io/developer/1749481503) | [Appknot](https://appshunter.io/developer/459436737) |

## What reviewers say

### Smart Spam Filter

[App page](https://appshunter.io/ios/app/smart-spam-filter/id6503603784)

This AI-powered application automatically filters unwanted spam and smishing messages. It utilizes advanced AI models, both online and on-device, to detect and block new types of fraudulent texts in real-time. Additional features include custom blacklisting and whitelisting for enhanced control.

**Highlights:** AI-based spam/smishing filtering, Online real-time AI detection, On-device AI learning, Keyword and number blocking, Whitelist functionality

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy a cup of coffee per month | $2.99 | per month |
| Support a chicken per year | $29.99 | per year |


### Appknot Trace

[App page](https://appshunter.io/ios/app/appknot-trace/id6786939396)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Spam Filter free?

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

### Is Appknot Trace free?

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

### Do Smart Spam Filter or Appknot Trace have ads?

Neither Smart Spam Filter nor Appknot Trace shows ads.

### Which is updated more often, Smart Spam Filter or Appknot Trace?

Smart Spam Filter ships an update every 2 weeks, and Appknot Trace every 2 days. Most recently, Smart Spam Filter was updated on October 14, 2026 and Appknot Trace on October 4, 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.*