# デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] vs SkyTower Challenge

The clearest difference is in-app purchases: SkyTower Challenge at none against デブ部腎臓くん[ 忍者 放置 育成 ゲーム ]'s 4. SkyTower Challenge also leads on update cadence (every 2 weeks vs every 9 months). デブ部腎臓くん[ 忍者 放置 育成 ゲーム ]'s advantage is ads (none vs shown) and iOS requirement (7.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] sells 4 one-off in-app purchases. SkyTower Challenge asks for nothing beyond the download.

デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] ships an update every 9 months, SkyTower Challenge every 2 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] | SkyTower Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 92.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 171 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Agali Inc.](https://appshunter.io/developer/1164858378) | [Takuma Takahashi](https://appshunter.io/developer/1704744113) |

## What reviewers say

### デブ部腎臓くん[ 忍者 放置 育成 ゲーム ]

[App page](https://appshunter.io/ios/app/id906627356)

Train aメタボ (metabolic syndrome) ninja with kidney problems to lose weight and become healthier. This idle育成 (nurturing) game features simple tap and swipe controls, multiple endings, and bonus stages for collecting items and experience.

**Highlights:** Idle nurturing gameplay, Weight loss training simulation, Simple tap and swipe controls, Multiple endings based on choices, Bonus stages for item collection, Diet history logbook

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gold Throwing star | $0.99 | one-time |
| 黄金の手裏剣(5個) | $3.99 | one-time |
| Gold Throwing star(Fifteen) | $9.99 | one-time |
| 黄金の手裏剣(40個) | $19.99 | one-time |


### SkyTower Challenge

[App page](https://appshunter.io/ios/app/skytower-challenge/id6464111672)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] free?

デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] is free to download, with in-app purchases available.

### Is SkyTower Challenge free?

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

### Do デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] or SkyTower Challenge have ads?

SkyTower Challenge shows ads; デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] does not.

### Which is updated more often, デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] or SkyTower Challenge?

デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] ships an update every 9 months, and SkyTower Challenge every 2 weeks. Most recently, デブ部腎臓くん[ 忍者 放置 育成 ゲーム ] was updated on October 24, 2026 and SkyTower Challenge 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.*