# HE.DU vs Lechner Service

The clearest difference is update cadence: HE.DU at every 3 weeks against Lechner Service's every 10 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.

HE.DU ships an update every 3 weeks, Lechner Service every 10 months. The most recent releases landed on September 28, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | HE.DU | Lechner Service |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 10 months |
| Size | 248 MB | 24 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Österreichisches Rotes Kreuz, Landesverband Niederösterreich](https://appshunter.io/developer/1114795402) | [AdvanTex Software GmbH & Co. KG](https://appshunter.io/developer/1237550911) |

## What reviewers say

### HE.DU

[App page](https://appshunter.io/ios/app/hedu/id1114795403)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Lechner Service

[App page](https://appshunter.io/ios/app/lechner-service/id6462151914)

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

**In-app purchases:** none


## Frequently asked questions

### Is HE.DU free?

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

### Is Lechner Service free?

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

### Do HE.DU or Lechner Service have ads?

Neither HE.DU nor Lechner Service shows ads.

### Which is updated more often, HE.DU or Lechner Service?

HE.DU ships an update every 3 weeks, and Lechner Service every 10 months. Most recently, HE.DU was updated on September 28, 2026 and Lechner Service on September 27, 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.*