# Phsar World vs Derm Ko

The clearest difference is update cadence: Derm Ko at every 2 weeks against Phsar World's every 59 months. Derm Ko also leads on iOS requirement (10.0 vs 13.0). 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.

Phsar World ships an update every 59 months, Derm Ko every 2 weeks. The most recent releases landed on September 18, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Phsar World | Derm Ko |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 59 months | **Every 2 weeks** |
| Size | 57 MB | 63 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Sophea Sim](https://appshunter.io/developer/1542557150) | [Theom Buntheoun](https://appshunter.io/developer/1477603956) |

## What reviewers say

### Phsar World

[App page](https://appshunter.io/ios/app/phsar-world/id1578640656)

**Features:** macOS Compatibility

**In-app purchases:** none


### Derm Ko

[App page](https://appshunter.io/ios/app/derm-ko/id6449586967)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Phsar World free?

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

### Is Derm Ko free?

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

### Do Phsar World or Derm Ko have ads?

Neither Phsar World nor Derm Ko shows ads.

### Which is updated more often, Phsar World or Derm Ko?

Phsar World ships an update every 59 months, and Derm Ko every 2 weeks. Most recently, Phsar World was updated on September 18, 2026 and Derm Ko on September 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*