# USB vs Thunder Scanner

The clearest difference is rating: Thunder Scanner at 4.7 against USB's 4.2. Thunder Scanner also leads on ratings volume (649 vs 16) and update cadence (every 2 weeks vs monthly). USB's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, review sentiment, device support and iOS requirement there is nothing between them.

Both are free to download. Thunder Scanner sells 3 in-app purchases, starting at $2.99 per 7 days. USB asks for nothing beyond the download.

Thunder Scanner holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Thunder Scanner has 649 ratings behind it against 16, so its average is the more settled of the two. Written reviews complicate that: 75% of USB's written reviews are positive against 71% of Thunder Scanner's, so the app with the better star average is not the one people write more warmly about.

USB ships an update monthly, Thunder Scanner every 2 weeks. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | USB | Thunder Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (16 ratings)](https://appshunter.io/ios/app/usb-connect/id1563292212/reviews) | **[4.7 (649 ratings)](https://appshunter.io/ios/app/thunder-scanner-qr-reader/id6444072721/reviews)** |
| Number of ratings | 16 | **649** |
| Positive reviews | **75.0% of reviews** | 71.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 74 MB | 127 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [U.S. Boiler Company, LLC.](https://appshunter.io/developer/608292333) | [APEXMOBI PTE. LTD.](https://appshunter.io/developer/1604377579) |

## What reviewers say

### USB

[App page](https://appshunter.io/ios/app/usb-connect/id1563292212)

This tool connects to U.S. Boiler modulating condensing boilers via a Bluetooth adapter for commissioning, diagnostics, and service. It offers wizards for startup and troubleshooting, data logging, and remote support capabilities through a web portal.

**Highlights:** Bluetooth connectivity to boilers, Commissioning, diagnostic, and service functions, Startup, troubleshoot, and service wizards, Cloud data logging and reporting, Remote support via web portal, Boiler firmware and parameter updates

**In-app purchases:** none


### Thunder Scanner

[App page](https://appshunter.io/ios/app/thunder-scanner-qr-reader/id6444072721)

This app allows for quick scanning and generation of QR codes for various purposes, including sharing Wi-Fi passwords and event details. It also integrates AI to analyze scanned codes, providing context and summaries for a more insightful experience.

**Highlights:** Fast QR code scanning, QR code generation, AI analysis of scanned codes, Scan photos with GPT-4o, Obtain detailed information from codes, Easy sharing of generated codes

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Thunder Premium Weekly | $2.99 | per 7 days |
| Thunder Premium Weekly | $4.99 | per 7 days |
| Thunder Premium Yearly | $49.99 | per year |


## Frequently asked questions

### Is USB free?

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

### Is Thunder Scanner free?

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

### Which has better reviews, USB or Thunder Scanner?

Thunder Scanner is rated higher. USB averages 4.2 out of 5 from 16 ratings, while Thunder Scanner averages 4.7 from 649 ratings.

### Do USB or Thunder Scanner have ads?

Thunder Scanner shows ads; USB does not.

### Which is updated more often, USB or Thunder Scanner?

USB ships an update monthly, and Thunder Scanner every 2 weeks. Most recently, USB was updated on October 10, 2026 and Thunder Scanner on October 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.*