Comparison

Idle Universe vs KOZMONAUT

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

Head to head
About

Idle Universe

Tap to gather matter and create interstellar objects, from particles to galaxies. Objects automatically generate more matter, allowing for endless universe expansion. Unlock divine powers, upgrade objects, and utilize special abilities to grow your cosmic creation.

Highlights
  • Create 31 interstellar objects
  • Unlock 24 Divine Powers
  • Upgrade objects with multiple options
  • Obtain Dark Matter for special abilities
  • Gain Antimatter via prestige for permanent upgrades
  • Compete on leaderboards
  • Earn daily rewards and achievements
Features
Read full description

Create your own universe in this new addictive idle game! First, you have to gather matter yourself by tapping; but once you've got enough matter to create a couple of objects in your universe, these will produce more matter automatically by colliding. Features: • Create many different interstellar objects - from tiny particles to your own planets, galaxies and even more! • Unlock Divine Powers, powerful permanent upgrades! • Speed up the growth of your universe with even more powerful Evolvements, transcendental upgrades that persist even through restarts! • Upgrade all of your objects in various ways! You will need to find a strategy that fits your playstyle to succeed in the late-game! • Obtain Dark Matter and use special abilities like Augmented Production and Tapping! • Get even bigger with prestige! Every time you restart the game, you will obtain Antimatter, which can be used to buy permanent super upgrades! • Join the competition with a global leaderboard! • Get daily rewards! • Earn Achievements, not just for the sake of it, but to increase your production even further! There're plenty of opportunities in the game - you can play for weeks and never get bored! Try our new idle game and create your very own universe :)

About

KOZMONAUT

Explore the universe, build a mining empire, and battle monsters in this incremental tapper game. Earn resources even when offline and accelerate growth through expeditions. Collect loot, complete missions, and compete on leaderboards.

Highlights
  • Build and upgrade mines for exponential resource gain
  • Tap to battle endless waves of monsters and bosses
  • Offline resource accumulation
  • Expeditions to accelerate growth
  • Daily missions and rotating vendor for rewards
  • Global leaderboards for competition
  • Cosmetic drops to customize character
Features
Read full description

KOZMONAUT is the ultimate hybrid of your favorite mobile games. Scour the unknown universe building your mining empire, grabbing loot, vanquishing monsters, minibosses, and huge bosses. Tap away to build up more Spacedust to finance your mines which will accumulate resources even while you're away. But when you do come back, rapidly accelerate your growth by cleaning up the galaxy in your Expeditions. You are just a lone astronaut working for a mysterious entity called the Tendril Mind. Along the way you will meet mysterious beings offering loot and rewards, a diverse range of monsters and environments, and the insatiable desire to build an empire to unknown means. Gameplay Elements: -Build mines to earn more Spacedust at exponential rates. -Tap your way through endless waves of monsters and bosses collecting extra Spacedust and loot to increase your Spacedust gains and monster-vanquishing potential. -Defend your existing mines in high stakes, high rewards levels -Compete with other players around the world with leaderboards that measure both your Spacedust gains and your monster-vanquishing prowess. -Complete Daily Missions for even more rewards -Check out what's new in the Exchange, a rotating Vendor which sells powerful loot for currency that is earned in-game only! -Rare cosmetic drops from grinding planets which will change the appearance of KOZMO!

Screenshots

Idle Universe4 screens
KOZMONAUT4 screens

Verdict

The call

The clearest difference is ratings volume: Idle Universe at 1.5K against KOZMONAUT's 6. Idle Universe also leads on review sentiment (65% vs 50%). KOZMONAUT's advantage is update cadence (every 4 days vs every 3 weeks) and rating (4.5 vs 4.3). On price, ads, in-app purchases and monetization model 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. Idle Universe sells 7 one-off in-app purchases and KOZMONAUT sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

KOZMONAUT holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Idle Universe has 1.5K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 65% of Idle Universe's written reviews are positive against 50% of KOZMONAUT's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Idle Universe ships an update every 3 weeks, KOZMONAUT every 4 days. The most recent releases landed on November 1, 2026 and October 18, 2026 respectively.

Scorecard4 real differences · 6 level
Idle Universe versus KOZMONAUT: the parameters behind the verdict, then further details
ParameterIdle UniverseKOZMONAUT
PriceFreeFree
Rating4.3 (1.5K ratings)4.5 (6 ratings) — better
Positive reviews65.2% of reviews — better50.0% of reviews
Number of ratings1.5K — better6
Update frequencyEvery 3 weeksEvery 4 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size299 MB62 MB
Age rating4+9+
DeveloperDominik StallmannCoast Media House LLC

Customer experience

Idle Universe

All ratings1,517 ratings
Positive82.2%
Neutral9.2%
Negative8.6%
Written reviews299 reviews
Positive65.2%
Neutral15.4%
Negative19.4%

KOZMONAUT

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Bugs and requests

Idle Universe

Reported bugs

4 issues
  • Prestige button not working
  • Ads not providing expected rewards
  • Frequent crashes and freezes
  • Incorrect offline progress tracking

Requested features

4 requests
  • Offline progress tracking
  • More prestige layers and upgrades
  • Better optimization for larger screens
  • Improved tutorial and explanations

KOZMONAUT

Not enough reviews yet to summarise bugs or requests.

In-app purchases

7 purchases

Idle Universe

One-time7
  • 250 Dark Matter$3.99
  • Double Antimatter Gains$4.99
  • +100% Transcendence Exp$4.99
Show 4 more
  • Remove All Ads$8.99
  • 1000 Dark Matter$9.99
  • 2500 Dark Matter$24.99
  • 10000 Dark Matter$69.99
1 purchases

KOZMONAUT

One-time1
  • KOZMIC PACK$2.99

Questions

Is Idle Universe free?
Idle Universe is free to download, with in-app purchases available.
Is KOZMONAUT free?
KOZMONAUT is free to download, with in-app purchases available.
Which has better reviews, Idle Universe or KOZMONAUT?
KOZMONAUT is rated higher. Idle Universe averages 4.3 out of 5 from 1.5K ratings, while KOZMONAUT averages 4.5 from 6 ratings.
Do Idle Universe or KOZMONAUT have ads?
Both Idle Universe and KOZMONAUT show ads.
Which is updated more often, Idle Universe or KOZMONAUT?
Idle Universe ships an update every 3 weeks, and KOZMONAUT every 4 days. Most recently, Idle Universe was updated on November 1, 2026 and KOZMONAUT on October 18, 2026.

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