# 정승현 전공물리 vs 똑패스 Pro

The clearest difference is update cadence: 똑패스 Pro at every 2 months against 정승현 전공물리's every 19 months. 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.

정승현 전공물리 ships an update every 19 months, 똑패스 Pro every 2 months. The most recent releases landed on October 27, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 정승현 전공물리 | 똑패스 Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 2 months** |
| Size | 116 MB | 390 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ji-Won Lee](https://appshunter.io/developer/1531860872) | [WON JOON Noh](https://appshunter.io/developer/1885172830) |

## What reviewers say

### 정승현 전공물리

[App page](https://appshunter.io/ios/app/id1531860870)

**Features:** macOS Compatibility

**In-app purchases:** none


### 똑패스 Pro

[App page](https://appshunter.io/ios/app/pro/id6782593811)

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

**In-app purchases:** none


## Frequently asked questions

### Is 정승현 전공물리 free?

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

### Is 똑패스 Pro free?

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

### Do 정승현 전공물리 or 똑패스 Pro have ads?

Neither 정승현 전공물리 nor 똑패스 Pro shows ads.

### Which is updated more often, 정승현 전공물리 or 똑패스 Pro?

정승현 전공물리 ships an update every 19 months, and 똑패스 Pro every 2 months. Most recently, 정승현 전공물리 was updated on October 27, 2026 and 똑패스 Pro on October 12, 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.*