# Primary Particle vs Keep On Trucking

The clearest difference is in-app purchases: Primary Particle at none against Keep On Trucking's 1. Primary Particle also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Keep On Trucking's advantage is update cadence (every 2 months vs every 8 months) and ratings volume (9 vs 3). On price, rating and device support there is nothing between them.

Both are free to download. Keep On Trucking sells 1 one-off in-app purchase. Primary Particle asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Primary Particle against 5.0 for Keep On Trucking. Both are backed by a comparable volume of ratings — 3 and 9 respectively.

Primary Particle ships an update every 8 months, Keep On Trucking every 2 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Primary Particle | Keep On Trucking |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/primary-particle/id886683283/reviews) | [5.0 (9 ratings)](https://appshunter.io/ios/app/keep-on-trucking/id1176379021/reviews) |
| Number of ratings | 3 | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 47 MB | 280 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Schmitt](https://appshunter.io/developer/585665935) | [THE RISE COLLECTION](https://appshunter.io/developer/1000072797) |

## 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


### Keep On Trucking

[App page](https://appshunter.io/ios/app/keep-on-trucking/id1176379021)

Navigate a speeding highway by tapping to steer your truck. Avoid traffic and police to survive as long as possible. One mistake means the end of your run.

**Highlights:** Tap to steer left or right, Dodge oncoming traffic, Avoid police vehicles, Test your reflexes, Endless survival gameplay

**Features:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Primary Particle free?

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

### Is Keep On Trucking free?

Keep On Trucking is free to download, with in-app purchases available.

### Which has better reviews, Primary Particle or Keep On Trucking?

Primary Particle and Keep On Trucking are both rated 5.0 out of 5 on the App Store, from 3 and 9 ratings respectively.

### Do Primary Particle or Keep On Trucking have ads?

Keep On Trucking shows ads; Primary Particle does not.

### Which is updated more often, Primary Particle or Keep On Trucking?

Primary Particle ships an update every 8 months, and Keep On Trucking every 2 months. Most recently, Primary Particle was updated on November 6, 2026 and Keep On Trucking on November 4, 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.*