# Fenster vs InstallationPro

The clearest difference is update cadence: InstallationPro at every 4 weeks against Fenster's every 8 months. Fenster's advantage is iOS requirement (8.0 vs 15.0). 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.

Fenster ships an update every 8 months, InstallationPro every 4 weeks. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Fenster | InstallationPro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 weeks** |
| Size | 61 MB | 101 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Isogon Fenstersysteme GmbH](https://appshunter.io/developer/356169626) | [Digital Building Solutions GmbH](https://appshunter.io/developer/1456095004) |

## What reviewers say

### Fenster

[App page](https://appshunter.io/ios/app/fenster/id455902895)

**Features:** macOS Compatibility

**In-app purchases:** none


### InstallationPro

[App page](https://appshunter.io/ios/app/installationpro/id1456095005)

**In-app purchases:** none


## Frequently asked questions

### Is Fenster free?

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

### Is InstallationPro free?

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

### Do Fenster or InstallationPro have ads?

Neither Fenster nor InstallationPro shows ads.

### Which is updated more often, Fenster or InstallationPro?

Fenster ships an update every 8 months, and InstallationPro every 4 weeks. Most recently, Fenster was updated on September 30, 2026 and InstallationPro on October 2, 2026.

---

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