# Critical vs IdleSphere

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.

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.

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.

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

## The numbers

| Metric | Critical | IdleSphere |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (125 ratings)](https://appshunter.io/ios/app/critical-incremental-reactor/id6446354857/reviews)** | [3.9 (31 ratings)](https://appshunter.io/ios/app/idlesphere/id6480509205/reviews) |
| Number of ratings | **125** | 31 |
| Positive reviews | 18.2% of reviews | **46.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 8 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 99 MB | 224 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [WaffleStack Studio LLC](https://appshunter.io/developer/1523413949) | [Idle System, Inc.](https://appshunter.io/developer/1727483319) |

## What reviewers say

### Critical

[App page](https://appshunter.io/ios/app/critical-incremental-reactor/id6446354857)

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:** macOS Compatibility

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Gems | $2.99 | one-time |
| 100 Gems | $4.99 | one-time |
| Remove Ads | $7.99 | one-time |
| 225 Gems | $7.99 | one-time |
| Starter Pack | $9.99 | one-time |
| Remove All Ads | $9.99 | one-time |
| 225 Gems | $9.99 | one-time |
| 500 Gems | $9.99 | one-time |
| Pro Pack | $9.99 | one-time |
| Pro Pack | $14.99 | one-time |
| New Player Sale | $14.99 | one-time |
| 500 Gems | $14.99 | one-time |
| 1400 Gems | $19.99 | one-time |
| 800 Gems | $19.99 | one-time |
| 1400 Gems | $29.99 | one-time |
| 3000 Gems | $29.99 | one-time |
| 3000 Gems | $39.99 | one-time |


### IdleSphere

[App page](https://appshunter.io/ios/app/idlesphere/id6480509205)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chaotics 200 | $1.99 | one-time |
| Chaotics 1000 | $6.99 | one-time |
| Orbit Pack | $7.99 | one-time |
| Permanent Bonus | $9.99 | one-time |
| Digital Winter | $19.99 | one-time |
| Chaotics 5000 | $29.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*