# Bau vs Construction Acceptance

The clearest difference is in-app purchases: Bau at none against Construction Acceptance's 1. Bau also leads on iOS requirement (14.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Construction Acceptance sells 1 one-off in-app purchase. Bau asks for nothing beyond the download.

Bau ships an update every 2 months, Construction Acceptance every 5 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Bau | Construction Acceptance |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 1 MB | 1 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Open Experience GmbH](https://appshunter.io/developer/952266236) | [Cosmic Production d.o.o.](https://appshunter.io/developer/1882842325) |

## What reviewers say

### Bau

[App page](https://appshunter.io/ios/app/bau-tagebuch/id1193078948)

**Features:** Vision Pro support

**In-app purchases:** none


### Construction Acceptance

[App page](https://appshunter.io/ios/app/construction-acceptance/id6807588956)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Protocol Export | $8.99 | one-time |


## Frequently asked questions

### Is Bau free?

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

### Is Construction Acceptance free?

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

### Do Bau or Construction Acceptance have ads?

Neither Bau nor Construction Acceptance shows ads.

### Which is updated more often, Bau or Construction Acceptance?

Bau ships an update every 2 months, and Construction Acceptance every 5 weeks. Most recently, Bau was updated on October 24, 2026 and Construction Acceptance on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*