# Marble Run 2D vs Simon's Bacteria

The clearest difference is ads: Simon's Bacteria at none against Marble Run 2D's shown. Simon's Bacteria also leads on update cadence (every 11 days vs every 3 months). Marble Run 2D's advantage is iOS requirement (15.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Marble Run 2D sells 1 in-app purchase, starting at $4.99 per month and Simon's Bacteria sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Marble Run 2D ships an update every 3 months, Simon's Bacteria every 11 days. The most recent releases landed on October 13, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Marble Run 2D | Simon's Bacteria |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (96 ratings)](https://appshunter.io/ios/app/marble-run-2d/id1498313833/reviews)** | — |
| Number of ratings | **96** | — |
| Positive reviews | 51.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 11 days** |
| Monetization | Free with in-app purchases | — |
| Size | 159 MB | 15 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Darya Vladislavovna](https://appshunter.io/developer/1067566962) | [Andrei Kondratev](https://appshunter.io/developer/6786983517) |

## What reviewers say

### Marble Run 2D

[App page](https://appshunter.io/ios/app/marble-run-2d/id1498313833)

Design and build your own marble tracks in a 2D environment. Solve engaging puzzles, utilize diverse construction elements, and earn rewards as you create unique gravitational mazes. Immerse yourself in captivating gameplay.

**Highlights:** Create custom marble tracks, Solve engaging puzzles, Use diverse construction elements, Earn bonuses and rewards, Immersive 2D gameplay

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO User Subscription. | $4.99 | per month |

**What reviewers like**

- 👍 Entertaining gameplay
- 💡 Creative track and marble building
- 👍 Fun mechanics
- 👍 Good graphics and blocks
- 👍 Game is good

**What reviewers complain about**

- 😩 Slow loading times
-  anúncios Too many ads
- 🐛 Gray screen bug
- 🐛 Pipes not working
- 🐛 Glitchy screen

**Reported bugs**

- Slow loading on second play
- Gray screen bug
- Pipes not working anymore (marbles stay on top of holes)
- Glitch when pressing PRO
- Marbles fall into the void

**Requested features**

- Add new marbles
- Add custom marbles
- Add custom tracks
- Add moving objects
- Add a new funnel


### Simon's Bacteria

[App page](https://appshunter.io/ios/app/simons-bacteria/id6786983515)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |


## Frequently asked questions

### Is Marble Run 2D free?

Marble Run 2D is free to download, with in-app purchases available.

### Is Simon's Bacteria free?

Simon's Bacteria is free to download, with in-app purchases available.

### Do Marble Run 2D or Simon's Bacteria have ads?

Marble Run 2D shows ads; Simon's Bacteria does not.

### Which is updated more often, Marble Run 2D or Simon's Bacteria?

Marble Run 2D ships an update every 3 months, and Simon's Bacteria every 11 days. Most recently, Marble Run 2D was updated on October 13, 2026 and Simon's Bacteria on September 29, 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.*