# HKUST QR Code vs Knotd

The clearest difference is in-app purchases: HKUST QR Code at none against Knotd's 7. HKUST QR Code also leads on ads (none vs shown). Knotd's advantage is update cadence (every 2 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Knotd sells 7 in-app purchases, starting at $5.99 per 7 days. HKUST QR Code asks for nothing beyond the download.

HKUST QR Code ships an update every 2 months, Knotd every 2 weeks. The most recent releases landed on October 22, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | HKUST QR Code | Knotd |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 18 MB | 139 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Hong Kong University of Science and Technology](https://appshunter.io/developer/332536363) | [Yehan Lakvindu RANASINGHE](https://appshunter.io/developer/1837607753) |

## What reviewers say

### HKUST QR Code

[App page](https://appshunter.io/ios/app/hkust-qr-code/id6468639032)

This tool allows HKUST members to create secure, dynamic, and personalized QR codes. These codes can be used for access control, such as opening doors with compatible panels.

**Highlights:** Generate secure QR codes, Dynamic and personalized codes, Access control for HKUST members, Smartdoor Panel integration

**In-app purchases:** none


### Knotd

[App page](https://appshunter.io/ios/app/knotd-smart-ideas-daily/id6751936740)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| YBit Pro Weekly | $5.99 | per 7 days |
| YBit Pro Monthly | $9.99 | per month |
| YBit Pro Yearly | $59.99 | per year |
| YBit App: Daily Book Summaries Pro | $59.99 | per year |
| 67% Off Yearly | $59.99 | per year |
| 50% Off Yearly | $59.99 | per year |
| 30% Off Yearly | $59.99 | per year |


## Frequently asked questions

### Is HKUST QR Code free?

HKUST QR Code is free to download, with no in-app purchases.

### Is Knotd free?

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

### Do HKUST QR Code or Knotd have ads?

Knotd shows ads; HKUST QR Code does not.

### Which is updated more often, HKUST QR Code or Knotd?

HKUST QR Code ships an update every 2 months, and Knotd every 2 weeks. Most recently, HKUST QR Code was updated on October 22, 2026 and Knotd on October 26, 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.*