# Opus vs Blackbox 黑箱作業

The clearest difference is update cadence: Blackbox 黑箱作業 at every 2 months against Opus's every 7 months. Blackbox 黑箱作業 also leads on iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Opus ships an update every 7 months, Blackbox 黑箱作業 every 2 months. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Opus | Blackbox 黑箱作業 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 22 MB | 83 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Opus Business Media Ltd](https://appshunter.io/developer/510046062) | [Performer IT](https://appshunter.io/developer/499517160) |

## What reviewers say

### Opus

[App page](https://appshunter.io/ios/app/opus-digital-magazines/id510046059)

Access a curated collection of digital magazines focused on industry developments. Stay informed with the latest news, features, and expert advice on the go. Explore content relevant to cleaning, flooring, facilities management, and health & safety.

**Highlights:** Digital magazine access, Industry-specific content, Latest news and features, Access to back issues, Content for multiple industries

**Features:** macOS Compatibility

**In-app purchases:** none


### Blackbox 黑箱作業

[App page](https://appshunter.io/ios/app/blackbox/id6758135831)

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

**In-app purchases:** none


## Frequently asked questions

### Is Opus free?

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

### Is Blackbox 黑箱作業 free?

Blackbox 黑箱作業 is free to download, with no in-app purchases.

### Do Opus or Blackbox 黑箱作業 have ads?

Neither Opus nor Blackbox 黑箱作業 shows ads.

### Which is updated more often, Opus or Blackbox 黑箱作業?

Opus ships an update every 7 months, and Blackbox 黑箱作業 every 2 months. Most recently, Opus was updated on October 6, 2026 and Blackbox 黑箱作業 on October 25, 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.*