# Quantum Shieldz Cipher(QSC) vs Smart Spam Filter

The clearest difference is in-app purchases: Quantum Shieldz Cipher(QSC) at none against Smart Spam Filter's 2. Quantum Shieldz Cipher(QSC) also leads on iOS requirement (13.4 vs 16.0). Smart Spam Filter's advantage is update cadence (every 2 weeks vs every 3 months). 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. Quantum Shieldz Cipher(QSC) asks for nothing beyond the download.

Quantum Shieldz Cipher(QSC) ships an update every 3 months, Smart Spam Filter every 2 weeks. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Quantum Shieldz Cipher(QSC) | Smart Spam Filter |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 12 MB | 23 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [EYL](https://appshunter.io/developer/1144415361) | [Junbum Lee](https://appshunter.io/developer/1749481503) |

## What reviewers say

### Quantum Shieldz Cipher(QSC)

[App page](https://appshunter.io/ios/app/quantum-shieldz-cipherqsc/id1626011761)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Quantum Shieldz Cipher(QSC) free?

Quantum Shieldz Cipher(QSC) is free to download, with no in-app purchases.

### Is Smart Spam Filter free?

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

### Do Quantum Shieldz Cipher(QSC) or Smart Spam Filter have ads?

Neither Quantum Shieldz Cipher(QSC) nor Smart Spam Filter shows ads.

### Which is updated more often, Quantum Shieldz Cipher(QSC) or Smart Spam Filter?

Quantum Shieldz Cipher(QSC) ships an update every 3 months, and Smart Spam Filter every 2 weeks. Most recently, Quantum Shieldz Cipher(QSC) was updated on October 7, 2026 and Smart Spam Filter on October 14, 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.*