# AI공부노트 vs KEY LOUNGE

The clearest difference is in-app purchases: KEY LOUNGE at none against AI공부노트's 4. AI공부노트's advantage is update cadence (every 10 days vs every 3 months). On ads, device support and iOS requirement there is nothing between them.

AI공부노트 ships an update every 10 days, KEY LOUNGE every 3 months. The most recent releases landed on September 26, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | AI공부노트 | KEY LOUNGE |
| --- | --- | --- |
| Price | **Free** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 months |
| Size | 115 MB | 28 MB |
| Requires iOS | 16.6 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SNA](https://appshunter.io/developer/465897855) | [JEONGGEUM KIM](https://appshunter.io/developer/1896744655) |

## What reviewers say

### AI공부노트

[App page](https://appshunter.io/ios/app/ai/id6505056073)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 | $0.49 | one-time |
| 50 | $2.99 | one-time |
| 100 | $5.99 | one-time |
| 500 | $29.99 | one-time |


### KEY LOUNGE

[App page](https://appshunter.io/ios/app/key-lounge/id6775769590)

**In-app purchases:** none


## Frequently asked questions

### Is AI공부노트 free?

AI공부노트 is free to download, with in-app purchases available.

### Is KEY LOUNGE free?

Pricing for KEY LOUNGE is not currently listed on the App Store.

### Do AI공부노트 or KEY LOUNGE have ads?

Neither AI공부노트 nor KEY LOUNGE shows ads.

### Which is updated more often, AI공부노트 or KEY LOUNGE?

AI공부노트 ships an update every 10 days, and KEY LOUNGE every 3 months. Most recently, AI공부노트 was updated on September 26, 2026 and KEY LOUNGE on September 13, 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.*