# Dr. Lex vs Vaidya AI

The clearest difference is review sentiment: Dr. Lex at 100% against Vaidya AI's 71%. Vaidya AI's advantage is update cadence (every 3 days vs every 3 weeks). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Dr. Lex ships an update every 3 weeks, Vaidya AI every 3 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Dr. Lex | Vaidya AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (9 ratings)](https://appshunter.io/ios/app/dr-lex-diagnosis-simulator/id1507739648/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | **100.0% of reviews** | 71.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free | Free |
| Size | 86 MB | 75 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [SYLEX SA](https://appshunter.io/developer/1507595942) | [Fractal Analytics](https://appshunter.io/developer/1183704607) |

## What reviewers say

### Dr. Lex

[App page](https://appshunter.io/ios/app/dr-lex-diagnosis-simulator/id1507739648)

This interactive simulator trains medical professionals and students in advanced diagnostic skills using virtual patients and AI-powered decision support. Analyze cases, solve quizzes, and compete with others to sharpen your medical expertise.

**Highlights:** Virtual patient diagnosis simulator, AI clinical decision support, Interactive quizzes and difficulty levels, Competition events and rankings, Analysis of text and voice dictation cases, Reasoning for diagnostic suggestions

**Features:** macOS Compatibility

**In-app purchases:** none


### Vaidya AI

[App page](https://appshunter.io/ios/app/vaidya-ai/id6758719321)

Organize your medical records, track your health metrics, and receive personalized insights and reminders. This AI-powered companion offers a comprehensive approach to managing your well-being and understanding your health trends.

**Highlights:** Organized medical records (Medivault), AI-generated health score, Activity and fitness tracking, Nutrition and meal logging, Smart reminders for health routines, AI health companion for questions, Personalized health goals

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

**In-app purchases:** none


## Frequently asked questions

### Is Dr. Lex free?

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

### Is Vaidya AI free?

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

### Do Dr. Lex or Vaidya AI have ads?

Neither Dr. Lex nor Vaidya AI shows ads.

### Which is updated more often, Dr. Lex or Vaidya AI?

Dr. Lex ships an update every 3 weeks, and Vaidya AI every 3 days. Most recently, Dr. Lex was updated on October 24, 2026 and Vaidya AI on October 31, 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.*