# Fast Responders vs RetterTool

The clearest difference is in-app purchases: Fast Responders at none against RetterTool's 5. Fast Responders also leads on update cadence (every 3 weeks vs every 2 months). RetterTool's advantage is review sentiment (92% vs 57%) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

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

Fast Responders ships an update every 3 weeks, RetterTool every 2 months. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Fast Responders | RetterTool |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 56.9% of reviews | **91.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 40 MB | 19 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [medgineering GmbH](https://appshunter.io/developer/925317421) | [8devs GmbH](https://appshunter.io/developer/1517839277) |

## What reviewers say

### Fast Responders

[App page](https://appshunter.io/ios/app/fast-responders/id925317422)

This app connects qualified medical professionals to emergencies in their vicinity. It alerts nearby first-aiders to provide immediate assistance while professional rescue services are en route, potentially saving critical minutes and lives.

**Highlights:** Medical first aid network, Emergency alerts, Navigation to emergency location, Initiate first aid, Support for emergency services

**Features:** 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 Fast Responders free?

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

### Is RetterTool free?

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

### Do Fast Responders or RetterTool have ads?

Neither Fast Responders nor RetterTool shows ads.

### Which is updated more often, Fast Responders or RetterTool?

Fast Responders ships an update every 3 weeks, and RetterTool every 2 months. Most recently, Fast Responders was updated on September 24, 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.*