Marimo: My Moss Pet

Content rating
Everyone
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Content rating
Everyone
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About this game

A tiny green moss ball is waiting on your windowsill.

Marimo: My Moss Pet is a calm pet game about raising a marimo, the round moss ball that grows in cold lakes. There is no rush and nothing to lose. Give it clean water, a little nutrient and some sunlight, and watch it grow millimeter by millimeter, the way a real marimo does.

WHAT YOU DO
• Care: change the water, add nutrient, open the curtains for sunlight. Your marimo shows how it feels.
• Pet it: tap and drag your marimo around the tank. It answers with little words.
• Pop bubbles: photosynthesis makes bubbles rise. Pop them for gems.
• Mini-games: Bubble Pop, Marimo Roll and Marimo Merge. Short rounds, gems as rewards.
• Decorate: pebbles, water plants, a castle, a snail, shrimp and medaka fish. Ribbons and hats for your marimo.
• Collect: six marimo kinds. Sakura, sky, snow, night and golden marimo appear from splitting or from daily gift cards.
• Raise friends together: a bigger tank holds more than one marimo.

A GAME THAT WAITS FOR YOU
Your marimo keeps growing slowly while you are away, and it never dies. Come back after a busy day and it is still there, a little bigger. Daily missions and a small daily gift give you a reason to visit, never a punishment for staying away.

• Plays offline. No account, no ads, no in-app purchases.
• Ten languages: English, Korean, Spanish, Portuguese, French, German, Turkish, Polish, Indonesian, Italian.
• Made by a small team that keeps a real marimo on the desk.

Facts in the game are based on the real plant: marimo grow about 5 mm a year, prefer cool water and soft light, and split when they get large.
Raise a cozy moss ball. Feed it, pet it, play mini-games, collect rare marimo.
Updated on
Oct 2, 2026
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Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
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  • No data collected
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What’s new

- New minigame: Marimo Merge (4 minigames in total)
- Fixed top and bottom buttons hidden behind the status bar and taskbar on some devices, including foldables
- New app icon
- A gentler first launch with no pop-up on your very first visit
Content rating
Everyone
Learn more

App support

About the developer
(주)아이뉴
inew@inew.kr
대한민국 10071 경기도 김포시 김포한강10로133번길 127, 7층 734호(구래동,디원시티지식산업센터)
+82 31-992-5200