Primary Particle vs Keep On Trucking
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Primary Particle
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.
- Particle stabilization gameplay
- Color-matching mechanic
- Increasing difficulty
- Score-based progression
- Experiment simulation
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Art & Game Design by Ben Jelter Programming by Stefan Schmitt A fun puzzle game for everybody! Help Dr. Hadron with his particle experiment. Keep the particles stable for as long as possible so Dr. Hadron can study them. Don't let the particles escape or the experiment will end. Catch the particles... but make sure they're the right color! As your skill increases, so does your score. Watch out for tricky particles as your level increases. The particle collider cost $9 Billion. Don't waste it!
Keep On Trucking
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.
- Tap to steer left or right
- Dodge oncoming traffic
- Avoid police vehicles
- Test your reflexes
- Endless survival gameplay
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You have a big rig. You have a 4-lane road. Everyone else is driving the other way. Problem? Not for you. Keep On Trucking is a pixel-art arcade game about driving the wrong way into oncoming traffic and smashing everything in your path for points. SMASH FOR POINTS Every car you flatten scores. Taxis are worth 2. Ambulances are worth 3. Your conscience is worth nothing. DO NOT TOUCH THE COPS Police cars come with spinning red and blue sirens, and touching one ends your run. Weave, dodge, pray. THE ROAD FIGHTS BACK Road works close lanes with cones that shove your truck around. Every 30 cars, night falls and only your headlights light the way. CRASH IN STYLE When it all goes wrong, your trailer jackknifes and the cargo goes everywhere: bananas, fish, tires, cash, apples and ducks scattered across the road. NEW IN 2.0 Rebuilt from the ground up. - The Daily Road: the same road for everyone, every day. Race the ghost of your own best run. - Cargo contracts: one job per run, like "smash 4 taxis" for a +10 bonus. - Rain: puddles on the road splash and send your rig skidding for a moment. - Unlockable paint colours for your truck, earned with your best score. - Keep Driving: continue a run once by watching an ad. - New achievements and soft cop-siren glows, just like the original. ONE-TOUCH CONTROLS Hold the left side of the screen to steer left. Hold the right side to steer right. That is the whole manual. BRAGGING RIGHTS Climb the Game Center leaderboard and chase 26 achievements. Prefer no ads? An optional Remove Ads purchase clears them out, and makes Keep Driving free. Hit the road! How long can you Keep On Trucking?
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Primary Particle | Keep On Trucking |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (9 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 3 | 9 — better |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 47 MB | 280 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Schmitt | THE RISE COLLECTION |
Customer experience
Primary Particle
Keep On Trucking
In-app purchases
Primary Particle
No in-app purchases
Keep On Trucking
- Remove Ads$1.99
Questions
Is Primary Particle free?
Is Keep On Trucking free?
Which has better reviews, Primary Particle or Keep On Trucking?
Do Primary Particle or Keep On Trucking have ads?
Which is updated more often, Primary Particle or Keep On Trucking?
Other comparisons
