# Zwisch Surgery vs PsychAtlas

The clearest difference is update cadence: Zwisch Surgery at every 2 weeks against PsychAtlas's every 17 months. Zwisch Surgery also leads on iOS requirement (13.0 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.

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

Zwisch Surgery ships an update every 2 weeks, PsychAtlas every 17 months. The most recent releases landed on October 21, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Zwisch Surgery | PsychAtlas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/psychatlas/id6743687363/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 17 months |
| Monetization | — | Free |
| Size | 6 MB | 4 MB |
| Requires iOS | **13.0** | 26.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Covenant Data Systems, LLC](https://appshunter.io/developer/1393847632) | [Cameron Sabet](https://appshunter.io/developer/1803993569) |

## What reviewers say

### Zwisch Surgery

[App page](https://appshunter.io/ios/app/zwisch-surgery/id1320646033)

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

**In-app purchases:** none


### PsychAtlas

[App page](https://appshunter.io/ios/app/psychatlas/id6743687363)

Master psychiatry with focused lessons, clinical reasoning, and thousands of practice questions. Explore 19 domains covering diagnosis, pharmacology, and treatment. Test your knowledge with customizable quizzes and daily challenges.

**Highlights:** Thousands of practice questions with explanations, 19 psychiatry domains for rapid review, Clinical reasoning cases, Medication reference, Daily challenges and customizable quizzes, Progress tracking and statistics

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

**In-app purchases:** none


## Frequently asked questions

### Is Zwisch Surgery free?

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

### Is PsychAtlas free?

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

### Do Zwisch Surgery or PsychAtlas have ads?

Neither Zwisch Surgery nor PsychAtlas shows ads.

### Which is updated more often, Zwisch Surgery or PsychAtlas?

Zwisch Surgery ships an update every 2 weeks, and PsychAtlas every 17 months. Most recently, Zwisch Surgery was updated on October 21, 2026 and PsychAtlas 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.*