# Dermoscopy Two Step Algorithm vs Histo!

The clearest difference is price: Dermoscopy Two Step Algorithm at Free against Histo!'s $9.99. Dermoscopy Two Step Algorithm also leads on update cadence (every 5 months vs every 11 months) and iOS requirement (10.0 vs 13.0). Histo!'s advantage is rating (5.0 vs 4.6) and chart position (#140 vs unranked). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Dermoscopy Two Step Algorithm is free to download; Histo! costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Histo! holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 10 and 29 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Dermoscopy Two Step Algorithm ships an update every 5 months, Histo! every 11 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Dermoscopy Two Step Algorithm | Histo! |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [4.6 (10 ratings)](https://appshunter.io/ios/app/dermoscopy-two-step-algorithm/id731753300/reviews) | **[5.0 (29 ratings)](https://appshunter.io/ios/app/histo/id1128927858/reviews)** |
| Number of ratings | 10 | **29** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 11 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#140** |
| Size | 220 MB | 456 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Usatine & Erickson Media LLC](https://appshunter.io/developer/1466894388) | [John Ash](https://appshunter.io/developer/1128927857) |

## 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


### Histo!

[App page](https://appshunter.io/ios/app/histo/id1128927858)

**Currently charting:** #140 Top Paid · Medical (US App Store)

This medical study aid helps users learn and test their knowledge of histology. It features a vast library of identification slides, interactive learning modes, and a search function for efficient study.

**Highlights:** 2179 identification slides, 19 Main Topics and 148 Subtopics, Offline functionality, Labeled slide mode with interactive labels, Learn, Quiz, and Test modes, Marking and review of slides, Searchable keywords

**Features:** 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 Histo! free?

Histo! costs $9.99, with no in-app purchases.

### Which has better reviews, Dermoscopy Two Step Algorithm or Histo!?

Histo! is rated higher. Dermoscopy Two Step Algorithm averages 4.6 out of 5 from 10 ratings, while Histo! averages 5.0 from 29 ratings.

### Do Dermoscopy Two Step Algorithm or Histo! have ads?

Neither Dermoscopy Two Step Algorithm nor Histo! shows ads.

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

Dermoscopy Two Step Algorithm ships an update every 5 months, and Histo! every 11 months. Most recently, Dermoscopy Two Step Algorithm was updated on November 6, 2026 and Histo! on November 6, 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.*