# ONOMATOPIA vs MonMon Masters

The clearest difference is rating: ONOMATOPIA at 5.0 against MonMon Masters's 4.6. ONOMATOPIA also leads on iOS requirement (13.0 vs 15.0). MonMon Masters's advantage is ratings volume (30 vs 2) and update cadence (every 4 days vs every 10 days). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. ONOMATOPIA sells 12 in-app purchases, starting at $19.99 per year and MonMon Masters sells 17 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ONOMATOPIA holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: MonMon Masters has 30 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 70% of ONOMATOPIA's written reviews are positive against 73% of MonMon Masters's, so the app with the better star average is not the one people write more warmly about.

ONOMATOPIA ships an update every 10 days, MonMon Masters every 4 days. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | ONOMATOPIA | MonMon Masters |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/onomatopia/id6738948087/reviews)** | [4.6 (30 ratings)](https://appshunter.io/ios/app/monmon-masters/id6760277702/reviews) |
| Number of ratings | 2 | **30** |
| Positive reviews | 70.0% of reviews | **73.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 241 MB | 276 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [ENDROLL, K.K](https://appshunter.io/developer/1395441964) | [PLAYHARD](https://appshunter.io/developer/1229939286) |

## What reviewers say

### ONOMATOPIA

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

Build a peaceful island world with adorable creatures that create relaxing sounds. Mix nature and creature melodies to craft unique soundscapes for studying, sleeping, or unwinding. Collect and bond with creatures as your island grows, even when you're away.

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

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

**In-app purchases (12)**

| 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 |
| Matopi Time EX | $3.99 | one-time |
| Start Dash++ | $4.99 | one-time |
| Matopi Mania | $5.99 | one-time |
| Premium Gacha Coins x3 | $5.99 | one-time |
| Matopi Time EX | $5.99 | one-time |
| Big Spender | $8.99 | one-time |


### MonMon Masters

[App page](https://appshunter.io/ios/app/monmon-masters/id6760277702)

Collect and train mysterious creatures called MonMons to battle through a fantasy world. Develop strategic combat skills to dominate in arena brawls and defeat powerful raid bosses. Enjoy AFK progression and auto-battle features to grow your team.

**Highlights:** Collect and train hundreds of unique monsters, Summon, evolve, and upgrade legendary forms, Strategic RPG combat with tactical placement, Challenge massive raid bosses, Compete in a competitive arena, AFK progression and auto-battle gameplay

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

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Platinum Tamer License (Monthly) | $4.99 | per month |
| Special_Offer_1001 | $0.99 | one-time |
| Special_Offer_1003 | $2.99 | one-time |
| Special_Offer_1005 | $4.99 | one-time |
| Special_Offer_1010 | $9.99 | one-time |
| Special_Offer_1012 | $11.99 | one-time |
| Special_Offer_1015 | $14.99 | one-time |
| Special_Offer_1020 | $19.99 | one-time |
| Special_Offer_1025 | $24.99 | one-time |
| Special_Offer_1030 | $29.99 | one-time |
| Special_Offer_1040 | $39.99 | one-time |
| Special_Offer_1045 | $44.99 | one-time |
| Special_Offer_1048 | $47.99 | one-time |
| Special_Offer_1050 | $49.99 | one-time |
| Special_Offer_1070 | $69.99 | one-time |
| Special_Offer_1080 | $79.99 | one-time |
| Special_Offer_1100 | $99.99 | one-time |


## Frequently asked questions

### Is ONOMATOPIA free?

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

### Is MonMon Masters free?

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

### Which has better reviews, ONOMATOPIA or MonMon Masters?

ONOMATOPIA is rated higher. ONOMATOPIA averages 5.0 out of 5 from 2 ratings, while MonMon Masters averages 4.6 from 30 ratings.

### Do ONOMATOPIA or MonMon Masters have ads?

Both ONOMATOPIA and MonMon Masters show ads.

### Which is updated more often, ONOMATOPIA or MonMon Masters?

ONOMATOPIA ships an update every 10 days, and MonMon Masters every 4 days. Most recently, ONOMATOPIA was updated on October 15, 2026 and MonMon Masters on October 12, 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.*