# Thunder Scanner vs K

The clearest difference is device support: Thunder Scanner at 3 against K's 1. Thunder Scanner also leads on iOS requirement (13.0 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Thunder Scanner sells 3 in-app purchases, starting at $2.99 per 7 days and K sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Thunder Scanner ships an update every 2 weeks, K every 3 weeks. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Thunder Scanner | K |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (653 ratings)](https://appshunter.io/ios/app/thunder-scanner-qr-reader/id6444072721/reviews)** | — |
| Number of ratings | **653** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 127 MB | 6 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [APEXMOBI PTE. LTD.](https://appshunter.io/developer/1604377579) | [Jongyun Park](https://appshunter.io/developer/382617671) |

## What reviewers say

### 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 |


### K

[App page](https://appshunter.io/ios/app/k-compass/id6811790006)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| K-Compass Plus | $2.99 | one-time |


## Frequently asked questions

### Is Thunder Scanner free?

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

### Is K free?

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

### Do Thunder Scanner or K have ads?

Both Thunder Scanner and K show ads.

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

Thunder Scanner ships an update every 2 weeks, and K every 3 weeks. Most recently, Thunder Scanner was updated on November 3, 2026 and K on October 29, 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.*