# DWG FastView vs CtrlSun

The clearest difference is rating: DWG FastView at 4.5 against CtrlSun's 1.0. DWG FastView also leads on ratings volume (1.1K vs 1). CtrlSun's advantage is in-app purchases (none vs 9) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. DWG FastView sells 9 in-app purchases, starting at $0.99 per month. CtrlSun asks for nothing beyond the download.

DWG FastView holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: DWG FastView has 1.1K ratings behind it against 1, so its average is the more settled of the two.

DWG FastView ships an update every 4 weeks, CtrlSun every 3 weeks. The most recent releases landed on October 26, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | DWG FastView | CtrlSun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.1K ratings)](https://appshunter.io/ios/app/dwg-fastview-cad-viewer-and-editor/id456933691/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/ctrlsun/id1454687730/reviews) |
| Number of ratings | **1.1K** | 1 |
| Positive reviews | 68.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 418 MB | 26 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Gstarsoft Co., Ltd](https://appshunter.io/developer/456933697) | [Solar Scope de Mexico sapi de cv](https://appshunter.io/developer/1454687729) |

## What reviewers say

### DWG FastView

[App page](https://appshunter.io/ios/app/dwg-fastview-cad-viewer-and-editor/id456933691)

This cross-platform CAD application allows users to view, edit, and create 2D and 3D designs on the go. It supports a wide range of file formats and offers advanced tools for precise drawing, measurement, and annotation, even offline.

**Highlights:** View and edit 2D/3D CAD drawings, Supports over 40 3D drawing formats, Accurate measurement and annotation tools, Export to PDF, BMP, JPG, PNG, Offline access and no registration required, Full compatibility with AutoCAD (DWG, DXF)

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $0.99 | per month |
| 1 month | $7.99 | per month |
| 12 months | $8.99 | per year |
| 3 months | $9.99 | per 3 months |
| 1个月超级帐户测试 | $12.99 | per month |
| 1 month | $14.99 | per month |
| 3 months | $14.99 | per 3 months |
| 12 months | $47.99 | per year |
| 12 months | $69.99 | per year |

**What reviewers like**

- 🚀 Fast and efficient
- 👍 Easy to use and intuitive
- 💡 Convenient mobile CAD viewing and editing
- 🚀 Quick file loading
- 👍 Smooth performance

**What reviewers complain about**

- 🐛 Crashes and freezes
- 💰 Subscription model with limited free features
- 🔒 Lack of customer support and communication
- 🔒 Unclear upgrade and purchase process
- 🔒 Aggressive advertising and paywalls

**Reported bugs**

- Crashes when opening certain DWG files
- Issues with file uploads and synchronization
- Incompatibility with some device models
- Unreliable performance after recent updates

**Requested features**

- Support for 3D CAD files
- Improved layer management
- Better integration with cloud storage services
- Customizable units and dimensions
- More advanced drawing and editing tools


### CtrlSun

[App page](https://appshunter.io/ios/app/ctrlsun/id1454687730)

This app simplifies downloading CFE electricity bills and consumption data. It includes updated CFE tariffs and solar insolation data for project sizing. Manage sales teams and clients with its integrated CRM.

**Highlights:** Download CFE bills and consumption, Updated CFE tariffs and solar data, Size residential and commercial solar projects, Solar CRM for sales and client tracking, Manage up to 5+ sellers and clients

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DWG FastView free?

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

### Is CtrlSun free?

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

### Which has better reviews, DWG FastView or CtrlSun?

DWG FastView is rated higher. DWG FastView averages 4.5 out of 5 from 1.1K ratings, while CtrlSun averages 1.0 from 1 ratings.

### Do DWG FastView or CtrlSun have ads?

DWG FastView shows ads; CtrlSun does not.

### Which is updated more often, DWG FastView or CtrlSun?

DWG FastView ships an update every 4 weeks, and CtrlSun every 3 weeks. Most recently, DWG FastView was updated on October 26, 2026 and CtrlSun on October 7, 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.*