# ONOMATOPIA vs 眠くなるゲーム｜ねむひつじ

The clearest difference is ads: 眠くなるゲーム｜ねむひつじ at none against ONOMATOPIA's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. ONOMATOPIA sells 9 in-app purchases, starting at $19.99 per year and 眠くなるゲーム｜ねむひつじ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 11 days. The most recent releases landed on November 14, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | ONOMATOPIA | 眠くなるゲーム｜ねむひつじ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/onomatopia/id6738948087/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 69.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 11 days | Every 11 days |
| Monetization | Free with in-app purchases | — |
| Size | 241 MB | 19 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ENDROLL, K.K](https://appshunter.io/developer/1395441964) | [syoutarou ookura](https://appshunter.io/developer/1614144503) |

## What reviewers say

### ONOMATOPIA

[App page](https://appshunter.io/ios/app/onomatopia/id6738948087)

Build a serene island paradise filled with charming creatures that generate relaxing sounds. Discover unique Matopi, mix natural soundscapes, and watch your world grow even when you're offline. Perfect for unwinding, studying, or sleeping.

**Highlights:** Create custom soundscapes, Collect and bond with creatures, Idle island growth, Discover unique Matopi personalities, Over 350 million sound combinations

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grand Maestro (1-Year Plan) | $19.99 | per year |
| Full Energy Recharge | $0.99 | one-time |
| Start Dash | $1.99 | one-time |
| This Month's Mission Pass | $2.99 | one-time |
| Premium Gacha Coins x3 | $3.99 | one-time |
| Ad Coupons x100 | $3.99 | one-time |
| Start Dash++ | $4.99 | one-time |
| Matopi Mania | $5.99 | one-time |
| Premium Gacha Coins x3 | $5.99 | one-time |


### 眠くなるゲーム｜ねむひつじ

[App page](https://appshunter.io/ios/app/id6823655384)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| フル版 | $2.99 | one-time |


## Frequently asked questions

### Is ONOMATOPIA free?

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

### Is 眠くなるゲーム｜ねむひつじ free?

眠くなるゲーム｜ねむひつじ is free to download, with in-app purchases available.

### Do ONOMATOPIA or 眠くなるゲーム｜ねむひつじ have ads?

ONOMATOPIA shows ads; 眠くなるゲーム｜ねむひつじ does not.

### Which is updated more often, ONOMATOPIA or 眠くなるゲーム｜ねむひつじ?

ONOMATOPIA ships an update every 11 days, and 眠くなるゲーム｜ねむひつじ every 11 days. Most recently, ONOMATOPIA was updated on November 14, 2026 and 眠くなるゲーム｜ねむひつじ on November 13, 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.*