Marimo – Moss Ball Aquarium – Hiroki Yamada

Last updated on November 26th, 2025 at 11:20 pm

Marimo – Moss Ball Aquarium – Entertainment Game Review

Marimo - Moss Ball Aquarium Screenshot

Marimo – Moss Ball Aquarium is a Entertainment/Family game from Hiroki Yamada, first launched in 14th July 2015.
It’s rated 4+ and currently has 69+ ratings on the App Store.

What Makes Marimo – Moss Ball Aquarium Stand Out

This is the best Marimo app.

  • You can know growth of Marimo in real time. This feature is available on this app only.
  • Cool and beautiful aquarium.
  • Simple and easy.

Marimo is a water plant looks like green ball.
Care is very easy. You should change the water only once a week.
Marimo is very small at first, but it will grow bigger little by little every day.
Enjoy the growth of Marimo in your daily life!

This Entertainment game offers engaging gameplay and regular updates for mobile players.

Player Feedback

As a newer release, Marimo – Moss Ball Aquarium is building its player community. Early feedback suggests .

Recent Updates & Development

Latest Update: 14th July 2015

Recent improvements include:
This app has been updated by Apple to display the Apple Watch app icon.

Download & Availability

Marimo – Moss Ball Aquarium is available through the official App Store for iOS devices.

Get Marimo – Moss Ball Aquarium on App Store

Requirements: Requires iPhone 5s / iPad Air / iPad Air (Cellular) / iPad Mini 2 (Retina) / iPad Mini 2 (Retina, Cellular) / iPhone 6 / iPhone 6 Plus / iPad Air 2 / iPad Air 2 (Cellular) / iPad Mini 3 or later.

Compatible with iPhone and iPad devices.

Player Experience Highlights

Community Insight:

So, this game is well, for us boring. All of the hiroki yamada games are kinda boring, but they are really cute and you can feed them. This well, its kinda plain without a cute face. But the OTHER marmio game made by her, its like this, BUT WAY MORE CUTE. But if you wanna get it, go for it. This is just our opinion. Edit: wow yall little kid us had no respect sorry we were this rude.


Its cute and funny sometimes. We like showing our ball to our friends. We named it Lil Chicago.


Very straight forward. Simple. Elegant. You have moss ball. Watch it grow over time. Change the water. Bliss.


This game is awesome and we think if you are bored you could just check up on it but our only complaint is you cant make it grow faster but if you are a patient person we would most definitely recommend this to you.


Hello! Someone who has a living Marmio moss ball, Id like to say, maybe make it more real, like feeding it, or rolling it up because it loses shape. Although, Ive never seen an update? Plus, this game is quite old, but we hope you are updating it, it would be fun to do more things with it, like decorating the cage. Overall, this game is still fun and we recommend it. Thanks for reading.


Best game ever! No complaints! All the people who made this game should have a raise or something… Best game ever the creators are helping people out during this shut down and COVID.


If you look at the reviews it looks fake but its litterally so cute and fun when youre bored idk what else to say we named it marble and its so cuteee.


So cute!!!! We love our little Marimo and we will live him forever and this is best game.


The moss is very easy to wach and some thing to do when your bored plus it slowly grows. Our only complaints is that can you add calming music we havent seen if there is an update for the game but if there is ingnore that part! Anyways we would totally recommend this to the kidz and teens im almost a teen and we like this app 9/10.


So, this game is well, for us boring. All of the hiroki yamada games are kinda boring, but they are really cute and you can feed them. This well, its kinda plain without a cute face. But the OTHER marmio game made by her, its like this, BUT WAY MORE CUTE. But if you wanna get it, go for it. This is just our opinion.


If yall really want something fake to grow and give your attention to, Id suggest getting yourself a Tamagachi instead.
User feedback from Apple App Store


App Details

  • Version: 1.0
  • Size: 50.06 MB
  • iOS: 6.0 or later
  • Languages: EN, JA
  • Content Advisory:
  • Developer: [Hiroki Yamada]()

Last updated: 14th July 2015 | Genre: Entertainment, Family | Developer: Hiroki Yamada

More pages for Marimo – Moss Ball Aquarium – Hiroki Yamada