# MarimoSimulator vs RobotMania + Physics Sandbox

The clearest difference is price: MarimoSimulator at Free against RobotMania + Physics Sandbox's $5.99. MarimoSimulator also leads on rating (5.0 vs 4.3) and update cadence (every 3 weeks vs every 6 months). RobotMania + Physics Sandbox's advantage is ads (none vs shown) and review sentiment (100% vs 83%). On in-app purchases, device support and iOS requirement there is nothing between them.

MarimoSimulator is free to download; RobotMania + Physics Sandbox costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MarimoSimulator holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: RobotMania + Physics Sandbox has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 83% of MarimoSimulator's written reviews are positive against 100% of RobotMania + Physics Sandbox's, so the app with the better star average is not the one people write more warmly about.

MarimoSimulator ships an update every 3 weeks, RobotMania + Physics Sandbox every 6 months. The most recent releases landed on October 12, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | MarimoSimulator | RobotMania + Physics Sandbox |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/marimosimulator/id6503089573/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/robotmania-plus-physics-sandbox/id6762127275/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Monetization | **Ad-supported** | Paid |
| Size | 289 MB | 70 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +9 |
| Developer | [Takuma Takahashi](https://appshunter.io/developer/1704744113) | [Simon Zvara](https://appshunter.io/developer/1490607194) |

## What reviewers say

### MarimoSimulator

[App page](https://appshunter.io/ios/app/marimosimulator/id6503089573)

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.

**Highlights:** Idle marimo breeding, Relaxing gameplay, Visual light effects, Soothing music, Simple controls, Tank cleaning mechanic

**Features:** macOS Compatibility

**In-app purchases:** none


### RobotMania + Physics Sandbox

[App page](https://appshunter.io/ios/app/robotmania-plus-physics-sandbox/id6762127275)

Design, program, and play your own games in a creative physics sandbox. Build anything from robots and vehicles to entire worlds and challenges with a powerful yet simple editor. Join a community to discover and share creations.

**Highlights:** Design interactive mini-games and simulations, Build vehicles, robots, and worlds, Animate robots with joints and sliders, Powerful yet simple editor with touch controls, Discover and play community creations, Share your own robots and games online

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MarimoSimulator free?

MarimoSimulator is free to download, with no in-app purchases.

### Is RobotMania + Physics Sandbox free?

RobotMania + Physics Sandbox costs $5.99, with no in-app purchases.

### Which has better reviews, MarimoSimulator or RobotMania + Physics Sandbox?

MarimoSimulator is rated higher. MarimoSimulator averages 5.0 out of 5 from 1 ratings, while RobotMania + Physics Sandbox averages 4.3 from 6 ratings.

### Do MarimoSimulator or RobotMania + Physics Sandbox have ads?

MarimoSimulator shows ads; RobotMania + Physics Sandbox does not.

### Which is updated more often, MarimoSimulator or RobotMania + Physics Sandbox?

MarimoSimulator ships an update every 3 weeks, and RobotMania + Physics Sandbox every 6 months. Most recently, MarimoSimulator was updated on October 12, 2026 and RobotMania + Physics Sandbox on October 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*