# Buderus ProLibrary vs Helios ELS

The clearest difference is iOS requirement: Buderus ProLibrary at 12.0 against Helios ELS's 14.0. 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.

Buderus ProLibrary ships an update every 22 months, Helios ELS every 11 months. The most recent releases landed on September 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Buderus ProLibrary | Helios ELS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 11 months** |
| Monetization | Free | — |
| Size | 12 MB | 28 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bosch Thermotechnik GmbH](https://appshunter.io/developer/456233209) | [Helios Ventilatoren GmbH + Co KG](https://appshunter.io/developer/1553902986) |

## What reviewers say

### 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


### Helios ELS

[App page](https://appshunter.io/ios/app/helios-els/id6475874347)

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

**In-app purchases:** none


## Frequently asked questions

### Is Buderus ProLibrary free?

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

### Is Helios ELS free?

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

### Do Buderus ProLibrary or Helios ELS have ads?

Neither Buderus ProLibrary nor Helios ELS shows ads.

### Which is updated more often, Buderus ProLibrary or Helios ELS?

Buderus ProLibrary ships an update every 22 months, and Helios ELS every 11 months. Most recently, Buderus ProLibrary was updated on September 17, 2026 and Helios ELS 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.*