Comparison

ONOMATOPIA vs MonMon Masters

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

ONOMATOPIA

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
Read full description

A Cozy Idle Game Filled with Relaxing Sounds Escape into a peaceful world where adorable Matopi create relaxing sounds and your island grows while you're away. Collect new Matopi, discover their unique personalities, and build a cozy world you'll always want to come back to. ◆Create Your Own Soundscape Mix waves, rain, wind, birds, and the melodies of your Matopi. Create over 350 million relaxing sound combinations for studying, sleeping, working, or simply unwinding. ◆ Collect & Bond with Matopi Every Matopi has its own personality. Pet them, play with them, and grow closer over time. The stronger your bond becomes, the more surprises they may reveal. ◆ A World That Never Stops Growing Your island continues to grow even while you're away. Unlock new habitats, discover rare Matopi, and slowly uncover the mysteries of Onomatopia together with Siesta. ◆Slow Down. Relax. Stay a While. Onomatopia is more than an idle game. It's a peaceful place filled with gentle sounds, lovable creatures, and quiet moments you'll want to return to every day.

About

MonMon Masters

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
Read full description

Enter MonMon World, a vast royal fantasy world where legends are born and stars rise through endless battle. This is not just another RPG — it’s YOUR own epic saga of heroes, monsters, and immortal power. MonMons are mysterious creatures that exist only in MonMon World — powerful beings born from its ancient magic and untold legends. Begin your journey as a true tamer, explore dangerous lands, collect powerful MonMons, and lead them into clash, brawl, and all-out arena battle. Every battle demands your strategy, and every victory brings you closer to becoming the ultimate Champion. [ Catch, Collect, Summon, and Evolve ] Meet hundreds of unique monsters in the field and turn them into your ultimate team — every MonMon, no matter how big, is pocketable. Each MonMon features unique skills, roles, and traits. Master your strategy, evolve your MonMon, and summon legendary forms to unleash their immortal power. Collect rare MonMons, dominate raid bosses, and conquer the arena with strategic battle rush modes. Only a true tamer can rule the clash. [ Epic Battles, Strategy & Arena Brawl ] It’s not just a brawl — strategy wins battles. Engage in tactical battle systems where smart placement leads to victory. Face rival Champions in the arena. Every battle tests your strategy, and every victory brings you one step closer to becoming the ultimate Champion. Challenge massive raid bosses with your MonMons, unleash powerful skills, and survive brutal epic battles that define your saga. [ AFK Progression & Auto Battle Rush ] Too busy? No problem. Use the AFK system to ease the pressure of constant battles. Grow your MonMons through auto battles, and step in anytime with your own strategy and team setups. [ Adventure with Your Partner MonMons ] Travel the world with your partner MonMons, defeat enemies, and rise from rookie tamer to royal Champion. Every step forward expands your saga, every victory turns you into a living legend. [ Game Features ] • Collect and train powerful monsters • Summon, evolve, and upgrade legendary heroes • Strategic RPG combat with deep strategy • Massive raid bosses and competitive arena • Fast brawl, intense clash, and epic battle • AFK progression and auto rush gameplay • Build your ultimate strategy • Completely free to play [ Start Your Legend Now ] Your journey to become an immortal Champion begins today. Play now, rise through the stars, and write your own epic saga in MonMon World. ***FREE download now. Play today. Become a legend*** Download & Play — the arena awaits you. Privacy Policy : https://asset-files.playhardlab.com/Homepage/PrivacyPolicy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ONOMATOPIA4 screens
MonMon Masters4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
ONOMATOPIA versus MonMon Masters: the parameters behind the verdict, then further details
ParameterONOMATOPIAMonMon Masters
PriceFreeFree
Rating5.0 (2 ratings) — better4.6 (30 ratings)
Positive reviews70.0% of reviews73.2% of reviews — better
Number of ratings230 — better
Update frequencyEvery 10 daysEvery 4 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size241 MB276 MB
Age rating4+12+
DeveloperENDROLL, K.KPLAYHARD

Customer experience

ONOMATOPIA

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews20 reviews
Positive70.0%
Neutral15.0%
Negative15.0%

MonMon Masters

All ratings30 ratings
Positive86.7%
Neutral6.7%
Negative6.7%
Written reviews82 reviews
Positive73.2%
Neutral11.0%
Negative15.9%

In-app purchases

12 purchases

ONOMATOPIA

Subscriptions1
  • Grand Maestro (1-Year Plan)$19.991 Year
One-time11
  • Full Energy Recharge2 variants$0.99
  • Start Dash2 variants$1.99
  • This Month's Mission Pass2 variants$2.99
Show 8 more
  • Premium Gacha Coins x3$3.99
  • Ad Coupons x100$3.99
  • Matopi Time EX$3.99
  • Start Dash++$4.99
  • Matopi Mania$5.99
  • Premium Gacha Coins x3$5.99
  • Matopi Time EX$5.99
  • Big Spender$8.99
17 purchases

MonMon Masters

Subscriptions1
  • Platinum Tamer License (Monthly)7 Days trial$4.991 Month
One-time16
  • Special_Offer_1001$0.99
  • Special_Offer_1003$2.99
  • Special_Offer_1005$4.99
Show 13 more
  • Special_Offer_1010$9.99
  • Special_Offer_1012$11.99
  • Special_Offer_1015$14.99
  • Special_Offer_1020$19.99
  • Special_Offer_1025$24.99
  • Special_Offer_1030$29.99
  • Special_Offer_1040$39.99
  • Special_Offer_1045$44.99
  • Special_Offer_1048$47.99
  • Special_Offer_1050$49.99
  • Special_Offer_1070$69.99
  • Special_Offer_1080$79.99
  • Special_Offer_1100$99.99

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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