The Marimo vs Weird Aquarium
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
The Marimo
Care for a virtual green ball creature that grows over time. Keep its environment clean and provide light to ensure its survival. Customize its appearance and interact with it through various gestures.
- Virtual pet care
- Growth simulation
- Environment maintenance
- Customization options
- Interactive controls
- Social sharing
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Thank you 1,130,000 download!! [About Marimo] Marimo means a plant like a green ball which grow in Hokkaido, Japan. You can raise a Marimo. A marimo will grow up little by little every day. When water become dirty, you need to refresh water. If you don't take care of a Marimo long time, Marimo will wither. [Other Features] - You can rename Marimo, and change background. - Drag to move Marimo. - Double tap to pick tap Marimo. - Rotate marimo with two finger. - Marimo moves by the direction of the device. - You can upload image of Marimo on Twitter/Facebook. - Photosynthesis occurs in a bright place.
Weird Aquarium
Build and manage a unique 3D aquarium filled with bizarre creatures. Collect and raise unusual animals and monsters, and decorate your tank to attract even more visitors. Enjoy a relaxing and simple gameplay experience where you can earn energy from your creatures to purchase new items.
- Collect bizarre creatures
- Raise unusual animals and monsters
- 3D creature models with actions
- Decorate your aquarium
- Attract new creatures
- Earn energy from creatures
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Relaxing and uncomplicated! A game in which you put unusual creatures in an aquarium and raise them. From cute animals to monsters: Story One day, while out for a walk, you find a strange tree. As it turns out, it's a magical tree that attracts mysterious creatures. Game Overview In Weird Aquarium, players can collect dozens of bizarre creatures. You might even be able to get new characters by making your Aquarium beautiful! The creatures are in 3D and have a wide range of actions, making them endlessly fun to look at. Incredibly easy to play! You can be as hands-off as you like! Gameplay You have the ability to get Energy from the weird creatures. You can use that Energy to buy Items for your Aquarium. As you buy more Items, more and more creatures will visit, drawn in by the beauty of your Aquarium.
Screenshots
Verdict
The clearest difference is rating: Weird Aquarium at 4.8 against The Marimo's 4.4. Weird Aquarium also leads on update cadence (fortnightly vs every 3 months) and ratings volume (2.5K vs 16). The Marimo's advantage is monetization model (ad-supported vs free with in-app purchases). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Weird Aquarium holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Weird Aquarium has 2.5K ratings behind it against 16, so its average is the more settled of the two. Written reviews split almost evenly too, at 79% and 78% positive.
The Marimo ships an update every 3 months, Weird Aquarium fortnightly. Both last shipped on October 29, 2026.
| Parameter | The Marimo | Weird Aquarium |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (16 ratings) | 4.8 (2.5K ratings) — better |
| Positive reviews | 78.9% of reviews — better | 78.2% of reviews |
| Number of ratings | 16 | 2.5K — better |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 10.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 115 MB |
| Age rating | 4+ | 4+ |
| Developer | Kosuke Ogawa | Ryota Kikuchi |
Customer experience
The Marimo
Weird Aquarium
Bugs and requests
The Marimo
Not enough reviews yet to summarise bugs or requests.
Weird Aquarium
Reported bugs
4 issues- Crashes on launch or during gameplay
- Tutorial issues and inability to progress
- Ads not working or causing crashes
- Syncing and save data problems
Requested features
4 requests- More creature and decoration options
- Ability to interact with creatures and objects
- Multiplayer or social features
- Improved performance and stability
In-app purchases
The Marimo
No in-app purchases
Weird Aquarium
No in-app purchases
Questions
Is The Marimo free?
Is Weird Aquarium free?
Which has better reviews, The Marimo or Weird Aquarium?
Do The Marimo or Weird Aquarium have ads?
Which is updated more often, The Marimo or Weird Aquarium?
Other comparisons
