Marimoshi: Moss Ball
Your wish-keeping virtual pet
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
In Japan, a moss ball is given to someone you care about, as a charm. Marimoshi brings that small tradition to your phone: a little green creature to name, to look after, and to visit every morning.
Your aquarium is always open. Light drifts through the water, sand settles, and your moss ball wanders at its own pace. Morning is your morning and night is your night — the tank follows the real sky, and keeps living while you're away.
A MINUTE OF CARE A DAY
It needs four small things: clean water, light, food and a little love. Each one is a single tap. Stopping by once a day is enough — Marimoshi is never fast, loud or demanding.
A CARD EVERY MORNING
Every morning you've cared for it, your moss ball opens today's card for you. It's drawn from its mood, the season and the days you've spent together — a few quiet words that belong to your morning alone. Share it with one tap, if you want to.
A WISH ONLY YOU KNOW
Write down a wish and hand it to your moss ball. It keeps it for seven days. It never reads it, repeats it or comments on it — it simply keeps it. What you write never leaves your device: nothing is sent anywhere, nothing is stored anywhere. After seven days your wish is released and you can make a new one.
PASS ONE ON
Care for it regularly and your moss ball multiplies. The sprout can't be kept for yourself — it's only ever given away. It becomes your friend's first moss ball, and it always carries where it came from.
IT GROWS SLOWLY
Like a real marimo, it grows too quietly to notice day to day. You'll only see it weeks later, when you put an old share card next to a new one.
IT NEVER GETS SICK, IT NEVER DIES
Stay away a few days and it just looks faded. No guilt-trip notifications, no lost progress, no starting over. It's still there when you come back.
QUIET, AND YOURS
Two notifications a day at most. No account, no sign-in, no friend list, no ads. Your moss ball, your wish and your cards stay on your device.
In five languages: Türkçe, English, Deutsch, Español, 日本語. You can switch language inside the app at any time.
Marimoshi is for entertainment purposes only.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Bug fixes and performance improvements.
The developer, Eray Mutlu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Eray Mutlu
- Size
- 13 MB
- Category
- Simulation
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 4 more
- English, German, Japanese, Spanish, Turkish
- Age Rating
4+
- 4+
- Copyright
- © 2026 Marimoshi.com