# Ballet Diary vs 310 다이어트 클래스

The clearest difference is in-app purchases: 310 다이어트 클래스 at none against Ballet Diary's 1. 310 다이어트 클래스 also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Ballet Diary sells 1 one-off in-app purchase. 310 다이어트 클래스 asks for nothing beyond the download.

Ballet Diary ships an update every 10 days, 310 다이어트 클래스 weekly. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Ballet Diary | 310 다이어트 클래스 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 10 days | **Weekly** |
| Size | 49 MB | 5 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Studio Bliss](https://appshunter.io/developer/1837310610) | [kyungrok kim](https://appshunter.io/developer/6789381184) |

## What reviewers say

### Ballet Diary

[App page](https://appshunter.io/ios/app/ballet-diary/id6754591517)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 광고 제거 | $2.99 | one-time |


### 310 다이어트 클래스

[App page](https://appshunter.io/ios/app/310/id6789381182)

**In-app purchases:** none


## Frequently asked questions

### Is Ballet Diary free?

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

### Is 310 다이어트 클래스 free?

310 다이어트 클래스 is free to download, with no in-app purchases.

### Do Ballet Diary or 310 다이어트 클래스 have ads?

Ballet Diary shows ads; 310 다이어트 클래스 does not.

### Which is updated more often, Ballet Diary or 310 다이어트 클래스?

Ballet Diary ships an update every 10 days, and 310 다이어트 클래스 weekly. Most recently, Ballet Diary was updated on September 9, 2026 and 310 다이어트 클래스 on September 20, 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.*