# STD Triage Ask dermatologist vs Derm DDx

The clearest difference is ads: Derm DDx at none against STD Triage Ask dermatologist's shown. STD Triage Ask dermatologist's advantage is update cadence (monthly vs every 5 months) and rating (4.6 vs 4.3). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. STD Triage Ask dermatologist sells 7 one-off in-app purchases and Derm DDx sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

STD Triage Ask dermatologist holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 14 and 6 respectively.

STD Triage Ask dermatologist ships an update monthly, Derm DDx every 5 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | STD Triage Ask dermatologist | Derm DDx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (14 ratings)](https://appshunter.io/ios/app/std-triage-ask-dermatologist/id595867030/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/derm-ddx/id6499524221/reviews) |
| Number of ratings | **14** | 6 |
| Positive reviews | 85.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 63 MB | 10 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [iDoc24 Inc](https://appshunter.io/developer/969804193) | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) |

## What reviewers say

### STD Triage Ask dermatologist

[App page](https://appshunter.io/ios/app/std-triage-ask-dermatologist/id595867030)

Get anonymous answers from board-certified dermatologists about potential STDs or other skin concerns. Submit photos and questions for a personalized response within 24 hours, with no registration required.

**Highlights:** Anonymous dermatologist consultations, Photo submission for skin issues, Response within 24 hours, No registration required, Information on treatment and next steps, Expertise in STDs and intimate area skin problems

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iDoc24 Information | $25.99 | one-time |
| iDoc24 Information | $29.99 | one-time |
| iDoc24 Information | $32.99 | one-time |
| iDoc24 Information | $35.99 | one-time |
| "Dermatologist Evaluation from Triage" | $39.99 | one-time |
| iDoc24 Information | $39.99 | one-time |
| iDoc24 Information | $54.99 | one-time |


### 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 |


## Frequently asked questions

### Is STD Triage Ask dermatologist free?

STD Triage Ask dermatologist is free to download, with in-app purchases available.

### Is Derm DDx free?

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

### Which has better reviews, STD Triage Ask dermatologist or Derm DDx?

STD Triage Ask dermatologist is rated higher. STD Triage Ask dermatologist averages 4.6 out of 5 from 14 ratings, while Derm DDx averages 4.3 from 6 ratings.

### Do STD Triage Ask dermatologist or Derm DDx have ads?

STD Triage Ask dermatologist shows ads; Derm DDx does not.

### Which is updated more often, STD Triage Ask dermatologist or Derm DDx?

STD Triage Ask dermatologist ships an update monthly, and Derm DDx every 5 months. Most recently, STD Triage Ask dermatologist was updated on October 23, 2026 and Derm DDx on October 24, 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.*