MarimoSimulator vs Otter, the Game
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
MarimoSimulator
Experience daily relaxation by raising fluffy, cute marimo. Enjoy visual effects by switching lights and soothing music. This simple idle game is perfect for killing time and finding peace.
- Idle marimo breeding
- Relaxing gameplay
- Visual light effects
- Soothing music
- Simple controls
- Tank cleaning mechanic
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Easy Idle Breeding Game with Simple Controls ■ Purpose of the App ■ Experience daily relaxation by raising fluffy and cute marimo. Enjoy interesting visual effects by switching the lights. With beautiful graphics and soothing music that make you feel like you're raising marimo in a tank, forget your daily stress and spend peaceful moments. Unlike raising pets, the breeding elements are simple and easy!! Perfect for killing time! Raise marimo and feel the relaxation in your daily life. ■ How to Care for Marimo ■ Caring for marimo is easy. Clean the tank once every 4 days
Otter, the Game
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Meet a little otter on a cozy adventure. Explore a mysterious world, collect useful discoveries, and bring your otter family back together by finding lost pups. Bring your findings home, make your lair cozy, and uncover new surprises along the way. Explore. Collect. Rescue. Get cozy. Your little otter's adventure is just beginning. ---------- Credits Some 3D models in this game were generated with Meshy (meshy.ai), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/), and modified for use in this game.
Screenshots
Verdict
The clearest difference is ads: Otter, the Game at none against MarimoSimulator's shown. On price, update cadence, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MarimoSimulator ships an update every 3 weeks, Otter, the Game fortnightly. The most recent releases landed on November 4, 2026 and October 29, 2026 respectively.
| Parameter | MarimoSimulator | Otter, the Game |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 289 MB | 174 MB |
| Age rating | 4+ | 4+ |
| Developer | Takuma Takahashi | Serhii Kobak |
In-app purchases
MarimoSimulator
No in-app purchases
Otter, the Game
No in-app purchases
Questions
Is MarimoSimulator free?
Is Otter, the Game free?
Do MarimoSimulator or Otter, the Game have ads?
Which is updated more often, MarimoSimulator or Otter, the Game?
Other comparisons
