# AI Viewer vs CAD FastView

The clearest difference is rating: CAD FastView at 4.1 against AI Viewer's 2.9. CAD FastView also leads on ads (none vs shown) and review sentiment (54% vs 29%). AI Viewer's advantage is iOS requirement (13.0 vs 15.6). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. AI Viewer sells 1 in-app purchase, starting at $24.99 per year and CAD FastView sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

CAD FastView holds the better App Store score, 4.1 against 2.9. Both are backed by a comparable volume of ratings — 14 and 56 respectively. Written reviews point the same way: 29% of AI Viewer's written reviews are positive against 54% of CAD FastView's.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | AI Viewer | CAD FastView |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (14 ratings)](https://appshunter.io/ios/app/ai-viewer/id1505083223/reviews) | **[4.1 (56 ratings)](https://appshunter.io/ios/app/cad-fastview-dwg-viewer/id6461084049/reviews)** |
| Number of ratings | 14 | **56** |
| Positive reviews | 28.6% of reviews | **54.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 19 MB | 33 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vaibhav Singhal](https://appshunter.io/developer/1719416463) | [镇源 余](https://appshunter.io/developer/1702066939) |

## 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 |


### CAD FastView

[App page](https://appshunter.io/ios/app/cad-fastview-dwg-viewer/id6461084049)

View, convert, and print CAD drawings on your mobile device. Supports DWG, DXF, and PDF formats with iCloud sync and Wi-Fi printing. Ideal for architects, engineers, and construction professionals.

**Highlights:** Fast DWG/DXF viewing, Convert drawings to PDF, Wi-Fi printing, iCloud synchronization, Layer layout management, Multiple viewing options

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is AI Viewer free?

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

### Is CAD FastView free?

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

### Which has better reviews, AI Viewer or CAD FastView?

CAD FastView is rated higher. AI Viewer averages 2.9 out of 5 from 14 ratings, while CAD FastView averages 4.1 from 56 ratings.

### Do AI Viewer or CAD FastView have ads?

AI Viewer shows ads; CAD FastView does not.

### Which is updated more often, AI Viewer or CAD FastView?

AI Viewer ships an update fortnightly, and CAD FastView fortnightly. Most recently, AI Viewer was updated on October 26, 2026 and CAD FastView on October 30, 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.*