# OPUS Architecture & Design vs Fabius

The clearest difference is in-app purchases: OPUS Architecture & Design at none against Fabius's 3. Fabius's advantage is update cadence (every 9 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Fabius sells 3 one-off in-app purchases. OPUS Architecture & Design asks for nothing beyond the download.

OPUS Architecture & Design ships an update every 2 weeks, Fabius every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | OPUS Architecture & Design | Fabius |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fabius/id6806862609/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Free | — |
| Size | 64 MB | 69 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [OPUS, Inc.](https://appshunter.io/developer/1591807718) | [Subhi Mukbel](https://appshunter.io/developer/6806046893) |

## What reviewers say

### OPUS Architecture & Design

[App page](https://appshunter.io/ios/app/opus-architecture-and-design/id1591807716)

Easily track project progress on the go with this comprehensive tool. Access all project information, including messaging, photo sharing, file management, and appointment planning, in one convenient application. Stay informed and manage your projects with clarity and serenity.

**Highlights:** Real-time project progress tracking, Integrated messaging, Photo sharing, File management, Appointment planning, Centralized project information

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

**In-app purchases:** none


### Fabius

[App page](https://appshunter.io/ios/app/fabius/id6806862609)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1,400 Credits | $4.99 | one-time |
| 6,200 Credits | $19.99 | one-time |
| 17,000 Credits | $49.99 | one-time |


## Frequently asked questions

### Is OPUS Architecture & Design free?

OPUS Architecture & Design is free to download, with no in-app purchases.

### Is Fabius free?

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

### Do OPUS Architecture & Design or Fabius have ads?

Neither OPUS Architecture & Design nor Fabius shows ads.

### Which is updated more often, OPUS Architecture & Design or Fabius?

OPUS Architecture & Design ships an update every 2 weeks, and Fabius every 9 days. Most recently, OPUS Architecture & Design was updated on October 24, 2026 and Fabius 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.*