# KÜSTER vs Buderus ProLibrary

The clearest difference is iOS requirement: Buderus ProLibrary at 12.0 against KÜSTER's 15.0. 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.

KÜSTER ships an update every 13 months, Buderus ProLibrary every 22 months. The most recent releases landed on September 6, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | KÜSTER | Buderus ProLibrary |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 13 months** | Every 22 months |
| Monetization | — | Free |
| Size | 18 MB | 12 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SCT Schiele GmbH](https://appshunter.io/developer/483354490) | [Bosch Thermotechnik GmbH](https://appshunter.io/developer/456233209) |

## What reviewers say

### KÜSTER

[App page](https://appshunter.io/ios/app/kuster/id1427292554)

**Features:** macOS Compatibility

**In-app purchases:** none


### Buderus ProLibrary

[App page](https://appshunter.io/ios/app/buderus-prolibrary/id1454663798)

This app offers systematic support for installing and maintaining Buderus systems. Scan product data plates to access specific, comprehensive information and view concise videos detailing processes.

**Highlights:** Systematic installation and maintenance support, Concise instructional videos, Product data plate scanning, Specific product information retrieval, Comprehensive application details

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

**In-app purchases:** none


## Frequently asked questions

### Is KÜSTER free?

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

### Is Buderus ProLibrary free?

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

### Do KÜSTER or Buderus ProLibrary have ads?

Neither KÜSTER nor Buderus ProLibrary shows ads.

### Which is updated more often, KÜSTER or Buderus ProLibrary?

KÜSTER ships an update every 13 months, and Buderus ProLibrary every 22 months. Most recently, KÜSTER was updated on September 6, 2026 and Buderus ProLibrary on September 17, 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.*