# Herzensretter vs RetterTool

The clearest difference is in-app purchases: Herzensretter at none against RetterTool's 5. Herzensretter also leads on iOS requirement (11.0 vs 17.6). RetterTool's advantage is update cadence (every 2 months vs every 62 months). On price, ads and device support there is nothing between them.

Both are free to download. RetterTool sells 5 in-app purchases, starting at $0.99 per month. Herzensretter asks for nothing beyond the download.

Herzensretter ships an update every 62 months, RetterTool every 2 months. The most recent releases landed on October 26, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Herzensretter | RetterTool |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 91.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 62 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 50 MB | 19 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 17+ | 17+ |
| Developer | [Johanniter-Unfall-Hilfe e.V.](https://appshunter.io/developer/1435468811) | [8devs GmbH](https://appshunter.io/developer/1517839277) |

## What reviewers say

### Herzensretter

[App page](https://appshunter.io/ios/app/herzensretter/id1435468812)

**Features:** macOS Compatibility

**In-app purchases:** none


### RetterTool

[App page](https://appshunter.io/ios/app/rettertool/id1605575736)

This app provides quick access to essential medical information and calculations for emergency and medical personnel. It includes tools for vital sign measurement, scoring systems, and various medical formulas to aid in patient assessment and treatment.

**Highlights:** Vital sign calculation (heart rate, respiratory rate), Medical scoring systems (qSOFA, APGAR, LAMS, GCS), Memory aids for protocols (ABCDE, SAMPLERS, ISBAR), Formula collection (burns, blood pressure, oxygen), Interactive EKG interpretation tool, Patient age-specific standard values

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro-Version Monatlich | $0.99 | per month |
| Kleines Trinkgeld | $0.99 | one-time |
| Mittleres Trinkgeld | $3.99 | one-time |
| Großes Trinkgeld | $8.99 | one-time |
| Pro-Version Lifetime | $22.99 | one-time |


## Frequently asked questions

### Is Herzensretter free?

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

### Is RetterTool free?

RetterTool is free to download, with in-app purchases available.

### Do Herzensretter or RetterTool have ads?

Neither Herzensretter nor RetterTool shows ads.

### Which is updated more often, Herzensretter or RetterTool?

Herzensretter ships an update every 62 months, and RetterTool every 2 months. Most recently, Herzensretter was updated on October 26, 2026 and RetterTool on November 7, 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.*