# EVM App vs RetterTool

The clearest difference is in-app purchases: EVM App at none against RetterTool's 5. EVM App also leads on review sentiment (100% vs 92%) and iOS requirement (9.0 vs 17.6). On price, update cadence, 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. EVM App asks for nothing beyond the download.

EVM App ships an update every 3 months, RetterTool every 2 months. The most recent releases landed on September 27, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | EVM App | RetterTool |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 91.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 19 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 17+ | 17+ |
| Developer | [Rhein-Kreis Neuss](https://appshunter.io/developer/476262676) | [8devs GmbH](https://appshunter.io/developer/1517839277) |

## What reviewers say

### EVM App

[App page](https://appshunter.io/ios/app/evm-app/id586272565)

This app provides algorithms for initial treatment protocols for common medical emergencies. It serves as a tool for medical professionals in pre-hospital settings, requiring appropriate training and expertise for effective use.

**Highlights:** Algorithms for common medical emergencies, Pre-clinical treatment protocols, Aids medical professionals, Requires certified users, Defines treatment pathways

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

**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 EVM App free?

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

### Is RetterTool free?

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

### Do EVM App or RetterTool have ads?

Neither EVM App nor RetterTool shows ads.

### Which is updated more often, EVM App or RetterTool?

EVM App ships an update every 3 months, and RetterTool every 2 months. Most recently, EVM App was updated on September 27, 2026 and RetterTool on October 8, 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.*