# YAM vs gemgem400

The clearest difference is iOS requirement: YAM at 12.0 against gemgem400's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. YAM sells 3 one-off in-app purchases and gemgem400 sells 5 in-app purchases, starting at $79.99 per month. Whichever you choose, the download price is not the number that matters.

YAM ships an update every 10 days, gemgem400 fortnightly. The most recent releases landed on September 15, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | YAM | gemgem400 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gemgem400-pinkfong-gemgem/id6475764223/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 599 MB | 274 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [weclover. Inc.](https://appshunter.io/developer/1631781617) | [Gemgem therapeutics Inc.](https://appshunter.io/developer/1661909612) |

## What reviewers say

### YAM

[App page](https://appshunter.io/ios/app/yam-e-coding/id1631781495)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1개월 이용권 | $9.99 | one-time |
| 3개월 이용권 | $29.99 | one-time |
| 12개월 이용권 | $99.99 | one-time |


### 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 YAM free?

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

### Is gemgem400 free?

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

### Do YAM or gemgem400 have ads?

Neither YAM nor gemgem400 shows ads.

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

YAM ships an update every 10 days, and gemgem400 fortnightly. Most recently, YAM was updated on September 15, 2026 and gemgem400 on September 21, 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.*