# PSNV vs RetterTool

The clearest difference is review sentiment: RetterTool at 92% against PSNV's 0%. RetterTool also leads on update cadence (every 2 months vs every 15 months). PSNV's advantage is in-app purchases (none vs 5) and iOS requirement (14.5 vs 17.6). 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. PSNV asks for nothing beyond the download.

PSNV ships an update every 15 months, RetterTool every 2 months. The most recent releases landed on August 21, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | PSNV | RetterTool |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **91.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 19 MB |
| Requires iOS | **14.5** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Verlagsgesellschaft Stumpf & Kossendey mbH](https://appshunter.io/developer/416760344) | [8devs GmbH](https://appshunter.io/developer/1517839277) |

## What reviewers say

### PSNV

[App page](https://appshunter.io/ios/app/psnv/id1588130441)

This app provides practical tools for psychosocial emergency care. It includes checklists for deployment planning, resources for those affected, and guidance for self-care. Designed for easy use by crisis intervention and emergency support staff.

**Highlights:** Deployment planning checklist, Resources for affected individuals, Guidance for crisis intervention, Self-care tips for staff, Formulation aids for explanations

**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 PSNV free?

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

### Is RetterTool free?

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

### Do PSNV or RetterTool have ads?

Neither PSNV nor RetterTool shows ads.

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

PSNV ships an update every 15 months, and RetterTool every 2 months. Most recently, PSNV was updated on August 21, 2026 and RetterTool on September 21, 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.*