Cosmic Synthesis vs Echo Planet
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- 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
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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?
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.
- 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
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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
Verdict
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
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.
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.
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.
| Parameter | Cosmic Synthesis | Echo Planet |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (15 ratings) | 4.9 (23 ratings) — better |
| Positive reviews | 28.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 15 | 23 — better |
| Update frequency | Weekly | Every 3 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 16.6 |
| Further details — not scored | ||
| Size | 161 MB | 96 MB |
| Age rating | 4+ | 4+ |
| Developer | NETBYTE UG (haftungsbeschränkt) | Mustafa Mohammed |
Customer experience
Cosmic Synthesis
Echo Planet
In-app purchases
Cosmic Synthesis
- Premium$1.99
Echo Planet
- Gold Supporter Pack$2.99
- Diamond Supporter Pack$5.99
Questions
Is Cosmic Synthesis free?
Is Echo Planet free?
Which has better reviews, Cosmic Synthesis or Echo Planet?
Do Cosmic Synthesis or Echo Planet have ads?
Which is updated more often, Cosmic Synthesis or Echo Planet?
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