Comparison

Critical vs IdleSphere

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

Head to head
About

Critical

Manage a reactor to prevent it from becoming critical by delivering water. Earn money over time to unlock permanent upgrades and improve your survival capabilities. Invest wisely to extend your runs and uncover secrets.

Highlights
  • Reactor management
  • Incremental income generation
  • Permanent upgrades
  • Research and secrets
  • Survival gameplay
Features
Read full description

Stop the reactor from going critical by delivering water. Robots are expensive though, so we use cheap expendable personnel instead. Money earned ramps up incrementally the longer you last. Survive as long as possible to maximize your income! Spend your hard earned cash to unlock permanent upgrades. Invest wisely to make each new run longer than the last. Tons of upgrades to buy, research to be done, and secrets to uncover. Give it a try! The longer you can keep the reactor from exploding, the more money you’ll make. Start small and watch your income grow exponentially as you survive longer and longer. Delay the inevitable cataclysm as long as possible and watch your cashflow go through the roof.

About

IdleSphere

Experience a visually stunning incremental game centered around spheres. Watch countless spheres come to life with synchronized graphics and in-game currency. Enjoy intuitive upgrades, a deep prestige system, and a wealth of content in this mesmerizing adventure.

Highlights
  • Visually stunning sphere graphics
  • Synchronized in-game currency and visuals
  • Intuitive upgrade system
  • Extensive prestige system
  • Zoom in and out functionality
  • Wealth of content
Features
Read full description

Introducing Idle Sphere, a stunningly beautiful incremental game that revolves around the captivating world of spheres. Prepare to be amazed as countless spheres come to life using cutting-edge technology. The game's graphics are seamlessly synchronized with the in-game currency, ensuring a mesmerizing visual experience. As you progress, you'll encounter increasingly complex, beautiful, and colossal spheres that will leave you in awe. Idle Sphere's gameplay is built on simple yet engaging upgrades, allowing you to enjoy the game intuitively. Immerse yourself in the satisfying experience of zooming in and out, admiring the exquisite beauty of the spheres. The game features an extensive prestige system that adds depth to your journey. Although some upgrades may reset when you prestige, fear not! You'll emerge stronger and quickly regain your former power, ready to take on new challenges. Despite its simplicity, Idle Sphere offers a wealth of content for you to explore and enjoy. Dive into this captivating world of spheres and embark on an unforgettable incremental gaming adventure!

Screenshots

Critical4 screens
IdleSphere4 screens

Verdict

The call

The clearest difference is rating: Critical at 4.4 against IdleSphere's 3.9. Critical also leads on ratings volume (125 vs 31) and iOS requirement (12.0 vs 15.0). IdleSphere's advantage is review sentiment (46% vs 18%). On price, update cadence, 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. Critical sells 17 one-off in-app purchases and IdleSphere sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Critical holds the better App Store score, 4.4 against 3.9. Both are backed by a comparable volume of ratings — 125 and 31 respectively. Written reviews complicate that: 18% of Critical's written reviews are positive against 46% of IdleSphere's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Critical ships an update fortnightly, IdleSphere every 8 days. The most recent releases landed on September 22, 2026 and September 20, 2026 respectively.

Scorecard4 real differences · 6 level
Critical versus IdleSphere: the parameters behind the verdict, then further details
ParameterCriticalIdleSphere
PriceFreeFree
Rating4.4 (125 ratings) — better3.9 (31 ratings)
Positive reviews18.2% of reviews46.4% of reviews — better
Number of ratings125 — better31
Update frequencyFortnightlyEvery 8 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.0
Further details — not scored
Size99 MB224 MB
Age rating4+4+
DeveloperWaffleStack Studio LLCIdle System, Inc.

Customer experience

Critical

All ratings125 ratings
Positive84.0%
Neutral4.8%
Negative11.2%
Written reviews11 reviews
Positive18.2%
Neutral18.2%
Negative63.6%

IdleSphere

All ratings31 ratings
Positive67.7%
Neutral19.4%
Negative12.9%
Written reviews28 reviews
Positive46.4%
Neutral28.6%
Negative25.0%

In-app purchases

17 purchases

Critical

One-time17
  • 100 Gems$2.99
  • 100 Gems$4.99
  • Remove Ads$7.99
Show 14 more
  • 225 Gems$7.99
  • Starter Pack$9.99
  • Remove All Ads$9.99
  • 225 Gems$9.99
  • 500 Gems$9.99
  • Pro Pack$9.99
  • Pro Pack$14.99
  • New Player Sale$14.99
  • 500 Gems$14.99
  • 1400 Gems$19.99
  • 800 Gems$19.99
  • 1400 Gems$29.99
  • 3000 Gems$29.99
  • 3000 Gems$39.99
6 purchases

IdleSphere

One-time6
  • Chaotics 200$1.99
  • Chaotics 1000$6.99
  • Orbit Pack$7.99
Show 3 more
  • Permanent Bonus$9.99
  • Digital Winter$19.99
  • Chaotics 5000$29.99

Questions

Is Critical free?
Critical is free to download, with in-app purchases available.
Is IdleSphere free?
IdleSphere is free to download, with in-app purchases available.
Which has better reviews, Critical or IdleSphere?
Critical is rated higher. Critical averages 4.4 out of 5 from 125 ratings, while IdleSphere averages 3.9 from 31 ratings.
Do Critical or IdleSphere have ads?
Both Critical and IdleSphere show ads.
Which is updated more often, Critical or IdleSphere?
Critical ships an update fortnightly, and IdleSphere every 8 days. Most recently, Critical was updated on September 22, 2026 and IdleSphere on September 20, 2026.

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