# Primary Particle vs Compound Quest

The clearest difference is update cadence: Compound Quest at every 2 months against Primary Particle's every 8 months. Compound Quest also leads on monetization model (free with in-app purchases vs paid). Primary Particle's advantage is ratings volume (3 vs 1). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Primary Particle against 5.0 for Compound Quest. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Primary Particle ships an update every 8 months, Compound Quest every 2 months. The most recent releases landed on November 6, 2026 and October 30, 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) | [5.0 (1 ratings)](https://appshunter.io/ios/app/compound-quest-word-games/id6744287187/reviews) |
| Number of ratings | **3** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 47 MB | 35 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-word-games/id6744287187)

Discover new English compound words by matching pictures, solving puzzles, and fusing word parts. Explore hundreds of illustrated words across challenging quests and unlock score multipliers. Review definitions and track your word collection.

**Highlights:** Picture matching puzzles, Word fragment fusion, Progressive difficulty quests, 300 illustrated words, Combo multipliers, Word collection and review

**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.

### Which has better reviews, Primary Particle or Compound Quest?

Primary Particle and Compound Quest are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### 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 2 months. Most recently, Primary Particle was updated on November 6, 2026 and Compound Quest on October 30, 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.*