# Rash vs Lanthier

The clearest difference is price: Lanthier at Free against Rash's $9.99. Lanthier also leads on rating (3.8 vs 1.0) and update cadence (every 2 months vs every 7 months). Rash's advantage is in-app purchases (none vs 2) and review sentiment (88% vs 62%). On ads and device support there is nothing between them.

Lanthier is free to download; Rash costs $9.99 up front. Lanthier sells 2 in-app purchases, starting at $19.49 per year. Rash asks for nothing beyond the download.

Lanthier holds the better App Store score, 3.8 against 1.0. That said, the two scores are not equally well evidenced: Lanthier has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 88% of Rash's written reviews are positive against 62% of Lanthier's, so the app with the better star average is not the one people write more warmly about.

Rash ships an update every 7 months, Lanthier every 2 months. The most recent releases landed on September 22, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Rash | Lanthier |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/rash/id669851114/reviews) | **[3.8 (5 ratings)](https://appshunter.io/ios/app/lanthier/id701664895/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | **87.5% of reviews** | 61.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | **Paid** | Subscription |
| Size | 172 MB | 70 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Bruno Girodias](https://appshunter.io/developer/669851117) | [Les Éditions Formed inc.](https://appshunter.io/developer/442932971) |

## What reviewers say

### Rash

[App page](https://appshunter.io/ios/app/rash/id669851114)

An educational tool and memory aid for identifying and understanding common childhood eruptive diseases. It offers essential information on care, treatment, and prevention, complemented by visual aids.

**Highlights:** Childhood disease identification, Care and treatment information, Preventive measures, Photos and illustrations, Memory aid sheets, Multilingual support (English, French, Spanish)

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

**In-app purchases:** none


### Lanthier

[App page](https://appshunter.io/ios/app/lanthier/id701664895)

Access up-to-date internal medicine information and guidelines quickly and efficiently. This app offers a fast search function, intuitive menus, and direct links to PubMed references. It's designed for physicians, residents, and medical students to use at the bedside.

**Highlights:** Concise bedside information, Advanced search function, Intuitive menus, Direct links to PubMed, Personal note-taking, Cross-device synchronization

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lanthier - current users | $19.49 | per year |
| Lanthier - new users | $19.49 | per year |


## Frequently asked questions

### Is Rash free?

Rash costs $9.99, with no in-app purchases.

### Is Lanthier free?

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

### Which has better reviews, Rash or Lanthier?

Lanthier is rated higher. Rash averages 1.0 out of 5 from 1 ratings, while Lanthier averages 3.8 from 5 ratings.

### Do Rash or Lanthier have ads?

Neither Rash nor Lanthier shows ads.

### Which is updated more often, Rash or Lanthier?

Rash ships an update every 7 months, and Lanthier every 2 months. Most recently, Rash was updated on September 22, 2026 and Lanthier on September 28, 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.*