# BAUSUBSTANZ vs +Doku

The clearest difference is update cadence: +Doku at every 2 months against BAUSUBSTANZ's every 11 months. 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.

BAUSUBSTANZ ships an update every 11 months, +Doku every 2 months. Both last shipped on October 10, 2026.

## The numbers

| Metric | BAUSUBSTANZ | +Doku |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Size | 109 MB | 54 MB |
| Requires iOS | 11.0 | **10.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fraunhofer](https://appshunter.io/developer/487639036) | [X-Interchange GmbH](https://appshunter.io/developer/1438909423) |

## What reviewers say

### BAUSUBSTANZ

[App page](https://appshunter.io/ios/app/bausubstanz/id860560312)

**Features:** macOS Compatibility

**In-app purchases:** none


### +Doku

[App page](https://appshunter.io/ios/app/plus-doku/id1438911531)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BAUSUBSTANZ free?

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

### Is +Doku free?

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

### Do BAUSUBSTANZ or +Doku have ads?

Neither BAUSUBSTANZ nor +Doku shows ads.

### Which is updated more often, BAUSUBSTANZ or +Doku?

BAUSUBSTANZ ships an update every 11 months, and +Doku every 2 months. Most recently, BAUSUBSTANZ was updated on October 10, 2026 and +Doku on October 10, 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.*