# Primary Particle vs Compound Quest

The clearest difference is update cadence: Compound Quest at every 5 weeks against Primary Particle's every 8 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Primary Particle ships an update every 8 months, Compound Quest every 5 weeks. The most recent releases landed on September 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Primary Particle | Compound Quest |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/primary-particle/id886683283/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 47 MB | 26 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Schmitt](https://appshunter.io/developer/585665935) | [毓鑫 戴](https://appshunter.io/developer/1498577196) |

## What reviewers say

### Primary Particle

[App page](https://appshunter.io/ios/app/primary-particle/id886683283)

A fun puzzle game where players help a scientist stabilize particles in an experiment. Catch particles of the correct color to keep the experiment going and increase your score. Beware of tricky particles that appear as your skill level rises.

**Highlights:** Particle stabilization gameplay, Color-matching mechanic, Increasing difficulty, Score-based progression, Experiment simulation

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

**In-app purchases:** none


### Compound Quest

[App page](https://appshunter.io/ios/app/compound-quest/id6744287187)

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

**In-app purchases:** none


## Frequently asked questions

### Is Primary Particle free?

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

### Is Compound Quest free?

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

### Do Primary Particle or Compound Quest have ads?

Neither Primary Particle nor Compound Quest shows ads.

### Which is updated more often, Primary Particle or Compound Quest?

Primary Particle ships an update every 8 months, and Compound Quest every 5 weeks. Most recently, Primary Particle was updated on September 20, 2026 and Compound Quest on October 7, 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.*