Comparison

Cosmic Synthesis vs Echo Planet

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

Echo Planet

Transform a planet into a star by forging moons that channel power to its core. Upgrade your celestial bodies, stack multipliers, and witness your energy output grow exponentially, even when you're not actively playing. This idle game offers a satisfying progression from small sparks to galaxy-scale power.

Highlights
  • Forge moons to power a planetary core
  • Upgrade moons and stack multipliers
  • Idle progression, play offline
  • Watch signal surge from sparks to galaxy-scale
  • Transform planet into a star
Features
Read full description

Forge moons that beam power into a sleeping planetary core, awakening it and ultimately igniting it into a star. Upgrade your moons, stack multipliers, and watch your signal surge from tiny sparks to galaxy-scale output, even while you’re offline.

Screenshots

Cosmic Synthesis4 screens
Echo Planet4 screens

Verdict

The call

The clearest difference is review sentiment: Echo Planet at 100% against Cosmic Synthesis's 29%. Echo Planet also leads on rating (4.9 vs 4.0) and update cadence (every 3 days vs weekly). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Cosmic Synthesis sells 1 one-off in-app purchase and Echo Planet sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Echo Planet holds the better App Store score, 4.9 against 4.0. Both are backed by a comparable volume of ratings — 15 and 23 respectively. Written reviews point the same way: 29% of Cosmic Synthesis's written reviews are positive against 100% of Echo Planet's.

UpkeepUpdate frequency

Cosmic Synthesis ships an update weekly, Echo Planet every 3 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Cosmic Synthesis versus Echo Planet: the parameters behind the verdict, then further details
ParameterCosmic SynthesisEcho Planet
PriceFreeFree
Rating4.0 (15 ratings)4.9 (23 ratings) — better
Positive reviews28.6% of reviews100.0% of reviews — better
Number of ratings1523 — better
Update frequencyWeeklyEvery 3 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better16.6
Further details — not scored
Size161 MB96 MB
Age rating4+4+
DeveloperNETBYTE UG (haftungsbeschränkt)Mustafa Mohammed

Customer experience

Cosmic Synthesis

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

Echo Planet

All ratings23 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Cosmic Synthesis

One-time1
  • Premium$1.99
2 purchases

Echo Planet

One-time2
  • Gold Supporter Pack$2.99
  • Diamond Supporter Pack$5.99

Questions

Is Cosmic Synthesis free?
Cosmic Synthesis is free to download, with in-app purchases available.
Is Echo Planet free?
Echo Planet is free to download, with in-app purchases available.
Which has better reviews, Cosmic Synthesis or Echo Planet?
Echo Planet is rated higher. Cosmic Synthesis averages 4.0 out of 5 from 15 ratings, while Echo Planet averages 4.9 from 23 ratings.
Do Cosmic Synthesis or Echo Planet have ads?
Both Cosmic Synthesis and Echo Planet show ads.
Which is updated more often, Cosmic Synthesis or Echo Planet?
Cosmic Synthesis ships an update weekly, and Echo Planet every 3 days. Most recently, Cosmic Synthesis was updated on October 25, 2026 and Echo Planet on October 24, 2026.

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