# 智慧下水道 vs S/N Scanner

The clearest difference is in-app purchases: 智慧下水道 at none against S/N Scanner's 1. 智慧下水道 also leads on iOS requirement (11.0 vs 16.0). S/N Scanner's advantage is update cadence (every 3 days vs every 11 months). On price, ads and device support there is nothing between them.

Both are free to download. S/N Scanner sells 1 in-app purchase, starting at $99.99 per year. 智慧下水道 asks for nothing beyond the download.

智慧下水道 ships an update every 11 months, S/N Scanner every 3 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 智慧下水道 | S/N Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (9 ratings)](https://appshunter.io/ios/app/sn-scanner-ocr-and-barcode/id6748554299/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 55 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MWH ENVIRONMENTAL TECHNOLOGIES TAIWAN LTD](https://appshunter.io/developer/1149762068) | [CyberSecThreat](https://appshunter.io/developer/1825038415) |

## What reviewers say

### 智慧下水道

[App page](https://appshunter.io/ios/app/id1672917587)

**Features:** macOS Compatibility

**In-app purchases:** none


### S/N Scanner

[App page](https://appshunter.io/ios/app/sn-scanner-ocr-and-barcode/id6748554299)

This app simplifies asset tracking for IT professionals with advanced barcode and OCR scanning. It allows for efficient inventory management, reconciliation, and secure data storage, all without requiring an internet connection.

**Highlights:** Barcode & OCR text recognition, Import, compare, and reconcile data, Remote sync and export (Pro), Multi-image documentation, Live scan mode, Advanced search and filtering, Smart duplicate prevention

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standalone Professional Annual Plan | $99.99 | per year |


## Frequently asked questions

### Is 智慧下水道 free?

智慧下水道 is free to download, with no in-app purchases.

### Is S/N Scanner free?

S/N Scanner is free to download, with in-app purchases available.

### Do 智慧下水道 or S/N Scanner have ads?

Neither 智慧下水道 nor S/N Scanner shows ads.

### Which is updated more often, 智慧下水道 or S/N Scanner?

智慧下水道 ships an update every 11 months, and S/N Scanner every 3 days. Most recently, 智慧下水道 was updated on October 27, 2026 and S/N Scanner on October 28, 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.*