# Bau vs 123quality

The clearest difference is review sentiment: Bau at 100% against 123quality's 67%. 123quality's advantage is update cadence (monthly vs every 4 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Bau ships an update every 4 months, 123quality monthly. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Bau | 123quality |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free | Free |
| Size | 2 MB | 61 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Open Experience GmbH](https://appshunter.io/developer/952266236) | [123erfasst.de GmbH](https://appshunter.io/developer/946458429) |

## What reviewers say

### Bau

[App page](https://appshunter.io/ios/app/bau-mangel/id952266237)

Streamline construction defect management with this mobile service. Capture issues on-site with photos and notes, automate documentation, and send notifications to resolve problems efficiently. Save time and reduce errors in construction processes.

**Highlights:** On-site defect capture, Automated documentation generation, Photo and freehand note integration, Assign responsibilities and deadlines, Email notifications for rectifications, Defect lifecycle management, Integration with CSV and Excel

**Features:** Vision Pro support

**In-app purchases:** none


### 123quality

[App page](https://appshunter.io/ios/app/123quality/id1457830788)

Streamline construction site management by digitally tracking defects and tasks. Capture relevant data, assign tickets, and share information with stakeholders in real-time. Supports offline data entry and easy export for improved project quality and time savings.

**Highlights:** Digital quality and defect management, Task and defect ticket creation, Photo documentation with location tagging, Offline data capture, Real-time data synchronization, Stakeholder collaboration, Customizable ticket types

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

**In-app purchases:** none


## Frequently asked questions

### Is Bau free?

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

### Is 123quality free?

123quality is free to download, with no in-app purchases.

### Do Bau or 123quality have ads?

Neither Bau nor 123quality shows ads.

### Which is updated more often, Bau or 123quality?

Bau ships an update every 4 months, and 123quality monthly. Most recently, Bau was updated on November 6, 2026 and 123quality on November 2, 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.*