# AViewer(에이뷰어) vs CaasWorks

The clearest difference is update cadence: CaasWorks at every 3 weeks against AViewer(에이뷰어)'s every 3 months. AViewer(에이뷰어)'s advantage is iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AViewer(에이뷰어) ships an update every 3 months, CaasWorks every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | AViewer(에이뷰어) | CaasWorks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aviewer/id1225508185/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 27 MB | 40 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BGWELL](https://appshunter.io/developer/1620299639) | [Jongmin Kim](https://appshunter.io/developer/1131462450) |

## What reviewers say

### AViewer(에이뷰어)

[App page](https://appshunter.io/ios/app/aviewer/id1225508185)

Access construction site design documents anytime, anywhere. Upload PDFs from the web and view them on mobile, with options for personal or shared markups and automatic drawing number extraction. Manage user permissions for controlled access.

**Highlights:** Web and mobile synchronization, View PDF drawings and documents, Personal and shared markups, Extract drawing numbers and names, User permission settings

**In-app purchases:** none


### CaasWorks

[App page](https://appshunter.io/ios/app/caasworks-contech/id1615681754)

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

**In-app purchases:** none


## Frequently asked questions

### Is AViewer(에이뷰어) free?

AViewer(에이뷰어) is free to download, with no in-app purchases.

### Is CaasWorks free?

CaasWorks is free to download, with no in-app purchases.

### Do AViewer(에이뷰어) or CaasWorks have ads?

Neither AViewer(에이뷰어) nor CaasWorks shows ads.

### Which is updated more often, AViewer(에이뷰어) or CaasWorks?

AViewer(에이뷰어) ships an update every 3 months, and CaasWorks every 3 weeks. Most recently, AViewer(에이뷰어) was updated on October 24, 2026 and CaasWorks on October 25, 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.*