# Dr.T vs 상급노하우

The clearest difference is ads: 상급노하우 at none against Dr.T's shown. 상급노하우 also leads on iOS requirement (15.1 vs 18.0). On price, 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.

## The numbers

| Metric | Dr.T | 상급노하우 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | — | Every 4 months |
| Size | 12 MB | 33 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [hongdae ju](https://appshunter.io/developer/986819803) | [kwonyoung joo](https://appshunter.io/developer/1885141955) |

## What reviewers say

### Dr.T

[App page](https://appshunter.io/ios/app/drt/id6755646617)

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

**In-app purchases:** none


### 상급노하우

[App page](https://appshunter.io/ios/app/id6760579875)

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

**In-app purchases:** none


## Frequently asked questions

### Is Dr.T free?

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

### Is 상급노하우 free?

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

### Do Dr.T or 상급노하우 have ads?

Dr.T shows ads; 상급노하우 does not.

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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.*