# AI Viewer vs Sketch Viewer UP

The clearest difference is rating: AI Viewer at 2.9 against Sketch Viewer UP's 1.6. AI Viewer also leads on review sentiment (29% vs 0%). Sketch Viewer UP's advantage is ads (none vs shown). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. AI Viewer sells 1 in-app purchase, starting at $24.99 per year and Sketch Viewer UP sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

AI Viewer holds the better App Store score, 2.9 against 1.6. Both are backed by a comparable volume of ratings — 14 and 10 respectively. Written reviews point the same way: 29% of AI Viewer's written reviews are positive against 0% of Sketch Viewer UP's.

AI Viewer ships an update fortnightly, Sketch Viewer UP every 8 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | AI Viewer | Sketch Viewer UP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (14 ratings)](https://appshunter.io/ios/app/ai-viewer/id1505083223/reviews)** | [1.6 (10 ratings)](https://appshunter.io/ios/app/sketch-viewer-up-model-browser/id6447847214/reviews) |
| Number of ratings | **14** | 10 |
| Positive reviews | **28.6% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 8 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 19 MB | 40 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Vaibhav Singhal](https://appshunter.io/developer/1719416463) | [骁宇 陈](https://appshunter.io/developer/1836429187) |

## What reviewers say

### AI Viewer

[App page](https://appshunter.io/ios/app/ai-viewer/id1505083223)

View Adobe Illustrator (.ai) files on your mobile device without needing a license. Convert .ai files to PDF or PNG, zoom in on previews, and easily locate Illustrator files stored on your device.

**Highlights:** Preview .ai files, Save as PDF or PNG, List all .ai files on device, Pinch to zoom, Remove ads permanently, Contact support

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $24.99 | per year |


### Sketch Viewer UP

[App page](https://appshunter.io/ios/app/sketch-viewer-up-model-browser/id6447847214)

This application allows users to import and view 3D models from various professional design software. It supports a wide range of file formats, making it convenient for designers, engineers, and students to access and analyze 3D drawings on their mobile devices.

**Highlights:** Import and view 3D drawings, Supports multiple professional 3D file formats, Collection of standard industry libraries, Mobile 3D viewing software, Professional CAD drawing and modeling

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一季度会员 | $9.99 | one-time |
| 一年会员 | $24.99 | one-time |
| 永久会员 | $29.99 | one-time |


## Frequently asked questions

### Is AI Viewer free?

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

### Is Sketch Viewer UP free?

Sketch Viewer UP is free to download, with in-app purchases available.

### Which has better reviews, AI Viewer or Sketch Viewer UP?

AI Viewer is rated higher. AI Viewer averages 2.9 out of 5 from 14 ratings, while Sketch Viewer UP averages 1.6 from 10 ratings.

### Do AI Viewer or Sketch Viewer UP have ads?

AI Viewer shows ads; Sketch Viewer UP does not.

### Which is updated more often, AI Viewer or Sketch Viewer UP?

AI Viewer ships an update fortnightly, and Sketch Viewer UP every 8 days. Most recently, AI Viewer was updated on October 26, 2026 and Sketch Viewer UP on October 24, 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.*