# Dermoscopy Two Step Algorithm vs PsoriasisCalc

The clearest difference is update cadence: Dermoscopy Two Step Algorithm at every 5 months against PsoriasisCalc's every 16 months. Dermoscopy Two Step Algorithm also leads on iOS requirement (10.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Dermoscopy Two Step Algorithm ships an update every 5 months, PsoriasisCalc every 16 months. The most recent releases landed on October 27, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Dermoscopy Two Step Algorithm | PsoriasisCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (10 ratings)](https://appshunter.io/ios/app/dermoscopy-two-step-algorithm/id731753300/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 16 months |
| Monetization | Free | — |
| Size | 220 MB | 10 MB |
| Requires iOS | **10.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Usatine & Erickson Media LLC](https://appshunter.io/developer/1466894388) | [Alejandro Escario](https://appshunter.io/developer/566871193) |

## What reviewers say

### Dermoscopy Two Step Algorithm

[App page](https://appshunter.io/ios/app/dermoscopy-two-step-algorithm/id731753300)

This app guides healthcare professionals in interpreting dermoscopic patterns to identify skin lesions. It uses a series of questions and provides over 80 images and charts to aid in diagnosis. Interactive cases are included for practice.

**Highlights:** Dermoscopic pattern interpretation, Question-based diagnostic guidance, Over 80 photos and charts, 50 interactive diagnostic cases, Offline functionality, Melanocytic and non-melanocytic lesion analysis

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

**In-app purchases:** none


### PsoriasisCalc

[App page](https://appshunter.io/ios/app/psoriasiscalc/id991407316)

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

**In-app purchases:** none


## Frequently asked questions

### Is Dermoscopy Two Step Algorithm free?

Dermoscopy Two Step Algorithm is free to download, with no in-app purchases.

### Is PsoriasisCalc free?

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

### Do Dermoscopy Two Step Algorithm or PsoriasisCalc have ads?

Neither Dermoscopy Two Step Algorithm nor PsoriasisCalc shows ads.

### Which is updated more often, Dermoscopy Two Step Algorithm or PsoriasisCalc?

Dermoscopy Two Step Algorithm ships an update every 5 months, and PsoriasisCalc every 16 months. Most recently, Dermoscopy Two Step Algorithm was updated on October 27, 2026 and PsoriasisCalc on October 16, 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.*