# Molecule Motion vs Bug

The clearest difference is in-app purchases: Bug at none against Molecule Motion's 1. Molecule Motion's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Molecule Motion sells 1 one-off in-app purchase. Bug asks for nothing beyond the download.

Molecule Motion ships an update weekly, Bug every 9 days. The most recent releases landed on August 12, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Molecule Motion | Bug |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/molecule-motion/id1245516577/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Free | — |
| Size | 50 MB | 174 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [重赞 韩](https://appshunter.io/developer/1131982671) | [Manuel Rauber](https://appshunter.io/developer/1752351626) |

## What reviewers say

### Molecule Motion

[App page](https://appshunter.io/ios/app/molecule-motion/id1245516577)

A simple game designed to test your sensitivity and observation skills. It's easy to pick up but challenging to master, offering a way to pass the time. This game is free to download and play, with no advertisements or in-app purchases.

**Highlights:** Tests sensitivity and observation, Easy to start, hard to master, Helps kill boring time, No advertising, No in-app purchases

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 388 yellow atoms | $0.99 | one-time |


### Bug

[App page](https://appshunter.io/ios/app/bug-a-ball/id1579462268)

**In-app purchases:** none


## Frequently asked questions

### Is Molecule Motion free?

Molecule Motion is free to download, with in-app purchases available.

### Is Bug free?

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

### Do Molecule Motion or Bug have ads?

Bug shows ads; Molecule Motion does not.

### Which is updated more often, Molecule Motion or Bug?

Molecule Motion ships an update weekly, and Bug every 9 days. Most recently, Molecule Motion was updated on August 12, 2026 and Bug on September 11, 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.*