Primary Particle vs Compound Quest
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!
Compound Quest
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.
- Picture matching puzzles
- Word fragment fusion
- Progressive difficulty quests
- 300 illustrated words
- Combo multipliers
- Word collection and review
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Two small words. One new discovery. sun + flower = sunflower. Compound Quest turns English compound words into a colorful adventure. Match pictures, complete words, and drag word parts together as you explore a trail of progressively harder quests. THREE WAYS TO PLAY • Picture Match: choose the illustration that matches two word parts. • Word Puzzle: find the missing part of a compound word. • Compound Fusion: drag and combine fragments to build words against the clock. A LITTLE CHALLENGE, A BIGGER COMBO Explore 300 illustrated words across 45 quests and five chapters. Start with familiar words and work toward more challenging combinations. Consecutive correct answers build your combo and unlock score multipliers up to 2×. Earn stars, replay quests, and beat your best streak. KEEP YOUR DISCOVERIES Review definitions and example sentences, collect the words you encounter, and track your collection milestones. Sound, music, and haptics can be adjusted in Settings. The word puzzles are in English. START FREE, EXPLORE WITH PREMIUM The first chapter is free. A one-time Premium in-app purchase unlocks all 45 quests and removes promotional banners. Premium is not a subscription. Users who downloaded the app before this Premium release retain full access at no additional cost. Restore purchases in Settings using the same Apple Account. Play the unlocked quests offline on iPhone and iPad. No game account is required. An internet connection is needed for purchases, restoration, and entitlement verification.
Screenshots
Verdict
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.
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. 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.
| Parameter | Primary Particle | Compound Quest |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (1 ratings) |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 47 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Schmitt | 毓鑫 戴 |
Customer experience
Primary Particle
Compound Quest
In-app purchases
Primary Particle
No in-app purchases
Compound Quest
No in-app purchases
Questions
Is Primary Particle free?
Is Compound Quest free?
Which has better reviews, Primary Particle or Compound Quest?
Do Primary Particle or Compound Quest have ads?
Which is updated more often, Primary Particle or Compound Quest?
Other comparisons
