# 키우미 vs gemgem400

The clearest difference is in-app purchases: 키우미 at none against gemgem400's 5. 키우미 also leads on update cadence (every 3 days vs every 3 weeks). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. gemgem400 sells 5 in-app purchases, starting at $79.99 per month. 키우미 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for 키우미 against 5.0 for gemgem400. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

키우미 ships an update every 3 days, gemgem400 every 3 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 키우미 | gemgem400 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/id6475394479/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/gemgem400-pinkfong-gemgem/id6475764223/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 89 MB | 276 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [주식회사 솔리브벤처스(SOLIVE VENTURES)](https://appshunter.io/developer/1724147190) | [Gemgem therapeutics Inc.](https://appshunter.io/developer/1661909612) |

## What reviewers say

### 키우미

[App page](https://appshunter.io/ios/app/id6475394479)

Get personalized child development guidance and advice based on expert knowledge and real consultation data. Ask questions anytime to receive tailored solutions, play ideas, and parenting tips for your child's specific needs.

**Highlights:** Personalized development guidance, Expert-based advice, Real consultation data, On-demand Q&A, Play and parenting tips

**Features:** macOS Compatibility

**In-app purchases:** none


### gemgem400

[App page](https://appshunter.io/ios/app/gemgem400-pinkfong-gemgem/id6475764223)

Engaging rehabilitation games designed to help individuals with limited movement on one side of the body or those needing fine motor skill improvement. The app encourages daily voluntary movements to promote neuroplasticity and build confidence through playful activities.

**Highlights:** Playful rehabilitation games, Fine motor skill improvement, Encourages voluntary movements, Promotes neuroplasticity, Builds self-confidence, Regularly updated content

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 잼잼400 정기 구독(Silver) | $79.99 | per month |
| 잼잼400 정기 구독(Gold) | $99.99 | per month |
| 잼잼400 정기 구독 - BASIC | $149.99 | per month |
| 잼잼400 정기 구독 - SILVER | $199.99 | per month |
| 잼잼400 정기 구독 - GOLD | $389.99 | per month |


## Frequently asked questions

### Is 키우미 free?

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

### Is gemgem400 free?

gemgem400 is free to download, with in-app purchases available.

### Which has better reviews, 키우미 or gemgem400?

키우미 and gemgem400 are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do 키우미 or gemgem400 have ads?

Neither 키우미 nor gemgem400 shows ads.

### Which is updated more often, 키우미 or gemgem400?

키우미 ships an update every 3 days, and gemgem400 every 3 weeks. Most recently, 키우미 was updated on November 4, 2026 and gemgem400 on October 30, 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.*