# Ogaan SFA Plus vs OneOpen

The clearest difference is in-app purchases: Ogaan SFA Plus at none against OneOpen's 2. OneOpen's advantage is update cadence (every 3 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. OneOpen sells 2 in-app purchases, starting at $0.99 per year. Ogaan SFA Plus asks for nothing beyond the download.

Ogaan SFA Plus ships an update every 6 weeks, OneOpen every 3 days. The most recent releases landed on October 28, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Ogaan SFA Plus | OneOpen |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 57.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 70 MB | 75 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [ABACUS DESK IT SOLUTIONS PRIVATE LIMITED](https://appshunter.io/developer/1460244190) | [Freedom Dimension (shenzhen) Technology Co., Ltd](https://appshunter.io/developer/6776064465) |

## What reviewers say

### Ogaan SFA Plus

[App page](https://appshunter.io/ios/app/ogaan-sfa-plus/id6739417392)

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

**In-app purchases:** none


### OneOpen

[App page](https://appshunter.io/ios/app/oneopen-file-viewer/id6792251542)

View a wide range of file types, including documents, web pages, CAD drawings, and 3D models, directly on your iPhone and iPad. Easily open and manage archives, EPUBs, and email attachments. Offers advanced features for CAD and 3D model manipulation.

**Highlights:** View HTML, Markdown, and web pages, Open and manipulate CAD drawings (DWG/DXF), Rotate and view 3D models (STEP, STL, OBJ, glTF), Browse and extract archives (ZIP, 7Z, RAR), Read EPUB books with chapter navigation, Inspect email headers and certificates, View PDF, Office, and image files

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Access Annual | $0.99 | per year |
| Advanced Access Lifetime | $2.99 | one-time |


## Frequently asked questions

### Is Ogaan SFA Plus free?

Ogaan SFA Plus is free to download, with no in-app purchases.

### Is OneOpen free?

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

### Do Ogaan SFA Plus or OneOpen have ads?

Neither Ogaan SFA Plus nor OneOpen shows ads.

### Which is updated more often, Ogaan SFA Plus or OneOpen?

Ogaan SFA Plus ships an update every 6 weeks, and OneOpen every 3 days. Most recently, Ogaan SFA Plus was updated on October 28, 2026 and OneOpen on November 1, 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.*