# Baby a lullaby vs 마인드 부스터 Blue

The clearest difference is in-app purchases: 마인드 부스터 Blue at none against Baby a lullaby's 1. Baby a lullaby's advantage is update cadence (every 9 days vs every 15 months) and device support. On price there is nothing between them.

Both are free to download. Baby a lullaby sells 1 one-off in-app purchase. 마인드 부스터 Blue asks for nothing beyond the download.

Baby a lullaby ships an update every 9 days, 마인드 부스터 Blue every 15 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Baby a lullaby | 마인드 부스터 Blue |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/baby-a-lullaby/id1425462017/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | **Every 9 days** | Every 15 months |
| Monetization | Free with in-app purchases | — |
| Size | 44 MB | 72 MB |
| Requires iOS | **10.0** | 13 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 12+ |
| Developer | [Kyuseok Lee](https://appshunter.io/developer/1308172428) | [Kyong Mee Chung](https://appshunter.io/developer/1441754708) |

## What reviewers say

### Baby a lullaby

[App page](https://appshunter.io/ios/app/baby-a-lullaby/id1425462017)

This application provides a collection of lullabies and white noise sounds to help soothe babies to sleep. It features a timer, repeat function, and random playback for customized sleep sessions.

**Highlights:** Lullabies for babies, White noise sounds, End timer setting, Repeat playback, Random playback

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 개발자에게 커피 선물하기 | $3.99 | one-time |


### 마인드 부스터 Blue

[App page](https://appshunter.io/ios/app/blue/id1591909232)

**In-app purchases:** none


## Frequently asked questions

### Is Baby a lullaby free?

Baby a lullaby is free to download, with in-app purchases available.

### Is 마인드 부스터 Blue free?

마인드 부스터 Blue is free to download, with no in-app purchases.

### Which is updated more often, Baby a lullaby or 마인드 부스터 Blue?

Baby a lullaby ships an update every 9 days, and 마인드 부스터 Blue every 15 months. Most recently, Baby a lullaby was updated on November 6, 2026 and 마인드 부스터 Blue on November 3, 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.*