# Schrack Smart Building vs DANUBEFLATS

The clearest difference is iOS requirement: Schrack Smart Building at 11.4 against DANUBEFLATS's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Schrack Smart Building ships an update every 5 months, DANUBEFLATS every 4 months. The most recent releases landed on October 18, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Schrack Smart Building | DANUBEFLATS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Size | 57 MB | 89 MB |
| Requires iOS | **11.4** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [evon Smart Home GmbH](https://appshunter.io/developer/1614841754) | [Pocket House GmbH](https://appshunter.io/developer/1450647392) |

## What reviewers say

### Schrack Smart Building

[App page](https://appshunter.io/ios/app/schrack-smart-building/id956506394)

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

**In-app purchases:** none


### DANUBEFLATS

[App page](https://appshunter.io/ios/app/danubeflats/id6738173085)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Schrack Smart Building free?

Schrack Smart Building is free to download, with no in-app purchases.

### Is DANUBEFLATS free?

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

### Do Schrack Smart Building or DANUBEFLATS have ads?

Neither Schrack Smart Building nor DANUBEFLATS shows ads.

### Which is updated more often, Schrack Smart Building or DANUBEFLATS?

Schrack Smart Building ships an update every 5 months, and DANUBEFLATS every 4 months. Most recently, Schrack Smart Building was updated on October 18, 2026 and DANUBEFLATS on October 12, 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.*