Comparison

Cosmic Synthesis vs Coreshatter

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Cosmic Synthesis

Build your own universe from atoms to galaxies in this idle-clicker adventure. Automate production, refine resources, and unlock cosmic milestones. The game adapts to both active strategists and idle players, offering a unique sci-fi experience.

Highlights
  • Tap to generate matter
  • Automate production chains
  • Refine resources into planets
  • Unlock over 50 cosmic milestones
  • Strategic talent tree
  • Prestige system for permanent upgrades
  • Offline progression
Features
Read full description

EXPERIENCE EXPONENTIAL GROWTH Transform raw matter into complex structures in this addictive incremental journey. Harness the power of synthesis and watch your empire scale to impossible heights: Tap to Generate: Create matter with a single touch. Automate Production: Unlock synthesis nodes that work for you 24/7. Refine Resources: Convert Matter into Atoms, Atoms into Molecules, and Molecules into massive Planets! GAME FEATURES Limitless Discovery: Reach over 50 cosmic milestones—from humble asteroids and quasars to black holes and parallel universes. Strategic Talent Tree: Choose your path! Specialize in Speed (production efficiency) or Discovery (rare events & research value). Powerful Prestige: Trigger a "Big Bang" reset to collect Dark Energy and Singularity Points for permanent, god-like upgrades. Offline Progression: Your universe never sleeps. Return to massive gains even after time away. Tactical Control: Pause individual production chains to optimize your strategy and manage resources like a cosmic pro. WHY COSMIC SYNTHESIS? Sleek Sci-Fi Aesthetic: A dark, nebula theme designed for space enthusiasts and science lovers. We value your flow. Watch rewarded ads only when YOU want a massive boost—completely optional. "From quantum foam to the singularity—every click brings you closer to ultimate cosmic mastery." PLAY YOUR WAY Whether you are an Active Strategist who loves micro-managing for maximum efficiency or an Idle Player who enjoys watching the numbers climb while away, Cosmic Synthesis adapts to your style. Are you ready for your own Big Bang?

About

Coreshatter

Build defenses, draft powerful upgrades, and bank your progress in this idle tower defense roguelite. The game continues to play and earn rewards while you're away, allowing for both quick check-ins and deep strategy sessions.

Highlights
  • Idle gameplay with offline progress
  • Roguelite drafting and build synergies
  • Deep progression systems
  • Ranked competitive ladders
  • In-run agency and clutch decisions
  • Accessibility options
Features
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Coreshatter is an idle tower defense roguelite. Enemies close in on your Core from every side, and your Glyphs fire on their own. You pick the build at each Draft and choose when to Shatter. You start with one Core and unlock more later. While you are away, your Cores keep earning Scrap and the Mainframe mines Data. Both bank when you return. THE BASICS - DEFEND: The Front is a line that closes on your Core, and the run ends if it gets there. HOLD pushes it back and REPAIR restores Core integrity. - DRAFT: Drafts offer Glyphs (weapons) and Chips (stat upgrades). Chips side by side can form one of 23 Circuits, and two Glyphs fuse into one of 451 Fusions. - SHATTER: Every run banks its Scrap and Data, however it ends. Shatter to end it yourself. In standard runs, it adds up to 25% bonus Scrap. - CONVERGE: Prestige to reset with permanent power, and unlock more Cores, Strain and Reformat as your Convergences add up. ENEMIES - Face 31 enemy types. Motes swarm, Splitters split when killed, Wardens carry shields, and bosses speed up the Front. - Each run rolls a modifier that changes the enemy mix, so the best build changes too. WHAT YOU KEEP - Unlock up to 8 Cores, each with its own Keystone (a trade-off you can swap for free), Core Law and Strain levels. Link Cores on the Core Map to raise their away income. - Converging pays Shards for Lattice upgrades. Reformat also clears your Shards and Lattice upgrades and pays Axioms, which buy permanent Axiom rules. STRAIN, CRAFTING AND CORE LAWS - Strain: from your first Convergence, each Core has eight levels, each adding a harder rule. Clear one by reaching its target wave and Shattering. First clears pay rewards. - Crafting: build your own Glyphs from parts earned in Strain. Choose how each one fires, fill its sockets and forge it. - Core Laws: turn on a Core's Law for an effect with a cost, such as a shockwave around the Core after every 10 kills near it, for 15% less Glyph range. THE ENDGAME - Buy every Axiom rule to open Vestiges: relics you forge from Fragments and equip for a passive bonus. - Hunt a Vestige to earn its Fragments from each boss you kill from wave 16 on and from runs that reach wave 100. Forge it again to raise its rarity toward Apex. - Gambit: stake Axioms on a run. Clear the target wave, then Shatter to get them back plus a payout. Any other ending loses them. RANKED - Two modes, each with seven leagues and three matches a day. Aegis Trials give everyone the same daily Glyphs, Fusions and Chips. In the Ascendant Ladder, you bring your own upgrades. - Ladder Seasons last six weeks. Rewards include cosmetics, Flux and Vestige Fragments. IDLE AND OFFLINE - Auto-Run earns part of the Scrap your live runs would, up to a time limit you can extend. - The optional Mainframe Subscription adds daily Flux, longer away limits, one more Core on Auto-Run and one more slot for Research, the timed upgrades you queue. ACCESSIBILITY - Colorblind safe mode adds shapes and labels to colors. - Reduced motion, screen shake and haptics toggles. Free to play. The Mainframe Subscription is an auto-renewable monthly subscription. Pricing is shown in the app and varies by region. The subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Privacy Policy: https://idleflowgames.com/privacy/coreshatter/ Terms of Use (EULA): https://idleflowgames.com/terms/coreshatter/

Screenshots

Cosmic Synthesis4 screens
Coreshatter4 screens

Verdict

The call

The clearest difference is review sentiment: Coreshatter at 80% against Cosmic Synthesis's 29%. Coreshatter also leads on rating (4.7 vs 4.0). On price, ratings volume, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Cosmic Synthesis sells 1 one-off in-app purchase and Coreshatter sells 8 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Coreshatter holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 15 and 7 respectively. Written reviews point the same way: 29% of Cosmic Synthesis's written reviews are positive against 80% of Coreshatter's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
Cosmic Synthesis versus Coreshatter: the parameters behind the verdict, then further details
ParameterCosmic SynthesisCoreshatter
PriceFreeFree
Rating4.0 (15 ratings)4.7 (7 ratings) — better
Positive reviews28.6% of reviews80.0% of reviews — better
Number of ratings15 — better7
Update frequencyWeeklyWeekly
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size161 MB66 MB
Age rating4+12+
DeveloperNETBYTE UG (haftungsbeschränkt)Idle Flow Games

Customer experience

Cosmic Synthesis

All ratings15 ratings
Positive60.0%
Neutral33.3%
Negative6.7%
Written reviews7 reviews
Positive28.6%
Neutral42.9%
Negative28.6%

Coreshatter

All ratings7 ratings
Positive85.7%
Neutral14.3%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral20.0%
Negative0.0%

In-app purchases

1 purchases

Cosmic Synthesis

One-time1
  • Premium$1.99
8 purchases

Coreshatter

Subscriptions1
  • Mainframe Subscription$4.991 Month
One-time7
  • Starter Cache$2.99
  • Flux: Charge$4.99
  • Remove Ads + 50% Boost$9.99
Show 4 more
  • Grid Season: Premium$9.99
  • Flux: Surge$19.99
  • Flux: Apex$49.99
  • Flux: Mega$99.99

Questions

Is Cosmic Synthesis free?
Cosmic Synthesis is free to download, with in-app purchases available.
Is Coreshatter free?
Coreshatter is free to download, with in-app purchases available.
Which has better reviews, Cosmic Synthesis or Coreshatter?
Coreshatter is rated higher. Cosmic Synthesis averages 4.0 out of 5 from 15 ratings, while Coreshatter averages 4.7 from 7 ratings.
Do Cosmic Synthesis or Coreshatter have ads?
Both Cosmic Synthesis and Coreshatter show ads.
Which is updated more often, Cosmic Synthesis or Coreshatter?
Cosmic Synthesis ships an update weekly, and Coreshatter weekly. Most recently, Cosmic Synthesis was updated on October 25, 2026 and Coreshatter on October 28, 2026.

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