# building & automation vs Klein

building & automation and Klein are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

building & automation ships an update every 16 months, Klein every 20 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | building & automation | Klein |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 16 months** | Every 20 months |
| Size | 160 MB | 6 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VDE VERLAG GMBH](https://appshunter.io/developer/443404609) | [apicodo GmbH](https://appshunter.io/developer/1169099711) |

## What reviewers say

### building & automation

[App page](https://appshunter.io/ios/app/building-and-automation/id1536417849)

**Features:** macOS Compatibility

**In-app purchases:** none


### Klein

[App page](https://appshunter.io/ios/app/klein-winternheim/id6740323722)

**In-app purchases:** none


## Frequently asked questions

### Is building & automation free?

building & automation is free to download, with no in-app purchases.

### Is Klein free?

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

### Do building & automation or Klein have ads?

Neither building & automation nor Klein shows ads.

### Which is updated more often, building & automation or Klein?

building & automation ships an update every 16 months, and Klein every 20 months. Most recently, building & automation was updated on October 27, 2026 and Klein on October 30, 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.*