OPUS Architecture & Design vs Fabius
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OPUS Architecture & Design
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.
- Real-time project progress tracking
- Integrated messaging
- Photo sharing
- File management
- Appointment planning
- Centralized project information
Read full descriptionHide full description
Following your project has never been this easy. With OPUS, take it with you wherever you go and keep on easily with its progress. Access all your project's information in one app. Start following its journey in real-time using a well-tailored tool conceived for you and your project. All the tools needed for an optimal monitoring such as messaging, photo sharing, file management, and appointment planning, have been reinvented to serve beyond your ambitions. With OPUS, discover a new way to follow your project, in clarity and serenity. We do our utmost to satisfy your wish to monitor, under the best conditions, the project that drives you. Therefore, we partner with the agency responsible of your project, to enable you to rediscover the follow-up of your project.
Fabius
Read full descriptionHide full description
Fabius lets you create your own AI agents and put them to work. DESIGN YOUR AGENTS Give each agent its own personality, instructions, model, and tools. A research assistant, a writing partner, a support bot — you decide what each one knows and what it is allowed to do. BRING YOUR KNOWLEDGE Upload documents and images, and your agents use them to give grounded, specific answers. WORK AS A TEAM Invite people to your workspace, give them a role, and choose who pays. CONNECT YOUR CHANNELS Link a Telegram bot and your agent answers there too. PRIVATE BY DESIGN No ads, no analytics, no tracking. Your conversations belong to you, and you can delete your account — and everything with it — anytime, right from Settings.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | OPUS Architecture & Design | Fabius |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 64 MB | 69 MB |
| Age rating | 4+ | 12+ |
| Developer | OPUS, Inc. | Subhi Mukbel |
Customer experience
OPUS Architecture & Design
Fabius
In-app purchases
OPUS Architecture & Design
No in-app purchases
Fabius
- 1,400 Credits$4.99
- 6,200 Credits$19.99
- 17,000 Credits$49.99









