# Upscale 4x AI vs BlurStack

The clearest difference is iOS requirement: Upscale 4x AI at 14.0 against BlurStack's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Upscale 4x AI sells 1 one-off in-app purchase and BlurStack sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Upscale 4x AI | BlurStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (279 ratings)](https://appshunter.io/ios/app/upscale-4x-aiphoto-enlarger/id6453162908/reviews)** | — |
| Number of ratings | **279** | — |
| Positive reviews | 80.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 523 MB | 1 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [丽譞 牛](https://appshunter.io/developer/944644382) | [PEI-CHUN CHAO](https://appshunter.io/developer/6792030550) |

## What reviewers say

### Upscale 4x AI

[App page](https://appshunter.io/ios/app/upscale-4x-aiphoto-enlarger/id6453162908)

This app uses AI to enhance low-resolution images, enlarging them up to 800% while restoring detail and clarity. It can improve portraits, landscapes, product photos, and even old or blurry pictures. Achieve high-definition results for professional, e-commerce, or personal use.

**Highlights:** AI-powered resolution enhancement, Up to 800% image enlargement, Face AI for portrait restoration, Noise removal and detail preservation, Restores old and cracked photos, Enhances anime images

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Edition | $3.99 | one-time |

**What reviewers like**

- 👍 Professional Quality
- 👍 Use this app on a daily basis
- 👍 Reasonable one-time fee
- 👍 Good quality
- 👍 Useful

**What reviewers complain about**

- 🐛 Changes face structure
- 🐛 Messes up background
- 🐛 Leaves lines and boxes in background
- 🐛 Substantially changes the original image
- 🐛 Edits the photo, makes it look cartoon-like

**Reported bugs**

- Incompatible with larger images
- Upscaling not working for some images

**Requested features**

- Batch processing for multiple images
- More control over upscaling
- Option to choose save location


### BlurStack

[App page](https://appshunter.io/ios/app/blurstack/id6795997699)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BlurStack Pro 終身版 | $5.99 | one-time |


## Frequently asked questions

### Is Upscale 4x AI free?

Upscale 4x AI is free to download, with in-app purchases available.

### Is BlurStack free?

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

### Do Upscale 4x AI or BlurStack have ads?

Neither Upscale 4x AI nor BlurStack shows ads.

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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.*