# Schulsani vs RetterTool

The clearest difference is in-app purchases: Schulsani at none against RetterTool's 5. Schulsani also leads on iOS requirement (8.0 vs 17.6). RetterTool's advantage is update cadence (every 2 months vs every 8 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. Schulsani asks for nothing beyond the download.

Schulsani ships an update every 8 months, RetterTool every 2 months. Both last shipped on October 8, 2026.

## The numbers

| Metric | Schulsani | RetterTool |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 91.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 55 MB | 19 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 17+ |
| Developer | [adabay GmbH](https://appshunter.io/developer/859172116) | [8devs GmbH](https://appshunter.io/developer/1517839277) |

## What reviewers say

### Schulsani

[App page](https://appshunter.io/ios/app/schulsani/id1114012463)

**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 Schulsani free?

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

### Is RetterTool free?

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

### Do Schulsani or RetterTool have ads?

Neither Schulsani nor RetterTool shows ads.

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

Schulsani ships an update every 8 months, and RetterTool every 2 months. Most recently, Schulsani was updated on October 8, 2026 and RetterTool on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*