# Derm DDx vs DermGPT

The clearest difference is in-app purchases: DermGPT at none against Derm DDx's 1. DermGPT also leads on update cadence (every 8 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Derm DDx sells 1 one-off in-app purchase. DermGPT asks for nothing beyond the download.

Derm DDx ships an update every 5 months, DermGPT every 8 days. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Derm DDx | DermGPT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/derm-ddx/id6499524221/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 33 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [Kaman Biotechnology, LLC](https://appshunter.io/developer/1591562642) |

## What reviewers say

### Derm DDx

[App page](https://appshunter.io/ios/app/derm-ddx/id6499524221)

This app provides visual, point-of-care guidance for diagnosing skin disorders. It features a large database of high-resolution images, allowing users to compare variations, zoom in, and access clinical history and treatment options for over 160 dermatologic conditions.

**Highlights:** 650+ high-quality dermatology images, Guidance for 160+ dermatologic conditions, Side-by-side image variations, Zoomable high-resolution images, Clinical history and treatment options, Cross-referencing to differential diagnoses, Full text search and custom notes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dermatology DDx | $69.99 | one-time |


### DermGPT

[App page](https://appshunter.io/ios/app/dermgpt/id6782643001)

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

**In-app purchases:** none


## Frequently asked questions

### Is Derm DDx free?

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

### Is DermGPT free?

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

### Do Derm DDx or DermGPT have ads?

Neither Derm DDx nor DermGPT shows ads.

### Which is updated more often, Derm DDx or DermGPT?

Derm DDx ships an update every 5 months, and DermGPT every 8 days. Most recently, Derm DDx was updated on October 17, 2026 and DermGPT on October 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.*