# QRat vs Dioptra

The clearest difference is update cadence: QRat at weekly against Dioptra's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. QRat sells 3 in-app purchases, starting at $2.99 per month and Dioptra sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

QRat ships an update weekly, Dioptra fortnightly. The most recent releases landed on November 3, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | QRat | Dioptra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/qrat-qr-code-generator/id1497158638/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 43.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Freemium | — |
| Size | 18 MB | 5 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, Mac | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [泰宁 陆](https://appshunter.io/developer/591708109) | [Zachary Griffin](https://appshunter.io/developer/1813803229) |

## What reviewers say

### QRat

[App page](https://appshunter.io/ios/app/qrat-qr-code-generator/id1497158638)

Easily create and customize QR codes with various styles, logos, and colors. Save your preferred settings and choose from curated templates. This tool also allows you to scan QR codes from your camera or image files.

**Highlights:** Convert URLs to QR codes from Safari, Customize colors, logos, and styles, Export in PNG, JPG, and SVG formats, Remember style settings, Curated design templates, Scan QR codes from camera or files

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QRat Pro Monthly | $2.99 | per month |
| Free Trial for 7 days | Free | one-time |
| Lifetime License | $9.99 | one-time |


### Dioptra

[App page](https://appshunter.io/ios/app/dioptra-glb-3d-model-viewer/id6812574588)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Tip | $1.99 | one-time |
| Generous Tip | $4.99 | one-time |


## Frequently asked questions

### Is QRat free?

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

### Is Dioptra free?

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

### Do QRat or Dioptra have ads?

Neither QRat nor Dioptra shows ads.

### Which is updated more often, QRat or Dioptra?

QRat ships an update weekly, and Dioptra fortnightly. Most recently, QRat was updated on November 3, 2026 and Dioptra 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.*