# OPUS – La Défense

> OPUS – La Défense (iPhone/iPad app by MonBuilding&Co.)

- Source: https://appshunter.io/ios/app/opus-la-defense/id1594210200 (this page in markdown: same URL + `.md`)
- Developer: [MonBuilding&Co](https://appshunter.io/developer/1274455986)
- Category: Social Networking
- Price: Free
- Age rating: 4+
- Requires: iOS 15.5 · 69 MB
- Languages: American English, French (France), German (Germany), Italian, European Spanish
- Released: 2021-11-28
- Data updated: 2026-08-06
- User reviews in markdown: https://appshunter.io/ios/app/opus-la-defense/id1594210200/reviews.md

## What is OPUS?

Join the app OPUS – La Défense and enjoy many services directly from your mobile.




Opus12 is a simple, practical & secure application to stay informed and communicate within a building.





The application allows you to :
- follow what's happening at Opus12 in real-time, with your building's news 
- to chat with other building's occupants via messenger or a forum
- benefit from services to simplify your daily life: concierge services, reservation of common areas or goods and all other third-party services integrated into the app.


## Version history (last 5 releases)

### 6.0.2 — 2026-07-31

Feature improvements and bugs fixes.

### 6.0.1 — 2026-07-10

Feature improvements and bugs fixes.

### 6.0.0 — 2026-06-13

Feature improvements and bugs fixes.

### 5.1.7 — 2026-05-23

Feature improvements and bugs fixes.

### 5.1.5 — 2026-04-24

Feature improvements and bugs fixes.

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## More apps by MonBuilding&Co

- [Witco](https://appshunter.io/ios/app/witco/id1274455987)
- [Student Factory](https://appshunter.io/ios/app/student-factory/id1402051426)
- [Nexity Studéa](https://appshunter.io/ios/app/nexity-studea/id1439305626)
- [CityLights](https://appshunter.io/ios/app/citylights/id1442288561)
- [Ma Residence](https://appshunter.io/ios/app/ma-residence/id1461463559)
- [103 Grenelle](https://appshunter.io/ios/app/103-grenelle/id1466208959)

All apps by MonBuilding&Co: https://appshunter.io/developer/1274455986

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-06.*