Criticality Idle - Reactor Sim
Quantum Fuzz Games iPhoneiPadiPod touch
Criticality Idle - Reactor Sim is a free Games app for iPhone and iPad by Quantum Fuzz. Requires iOS 13.0. Updated August 15, 2026.
- Price
- Free
- on the App Store
- Size
- 250 MB
- Age 4+
- Updated
- Aug 15
- 2026 · v1.1
Screenshots
About Criticality Idle - Reactor Sim
Inspired by real simulation tools used by nuclear engineers, Criticality Idle simulates nuclear reactor physics in a fun way that anyone can understand. Work your way through various reactor layouts, from realistic to silly, and everything in between. Reactor components include fuel, control rods, water, graphite, reflectors, and neutrons, all of which have multiple upgrades to increase power and income. Simulator particle limit can be adjusted based on your device capabilities while still maintaining accurate power and income levels.
What’s new
Version 1.1 · Updated August 15, 2026
New marketing URL. No code changes.
Play today's Sudoku puzzle
A quick 6×6 Sudoku every day; levels grow to the classic 9×9. A free daily puzzle from Fiplay, same board for everyone. It plays right here, no download.
App privacy
The developer, Quantum Fuzz, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Identifiers: Device ID, User ID
- Usage Data: Advertising Data
- User Content: Gameplay Content
Used for: Third-Party Advertising, Analytics, App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Diagnostics: Crash Data, Performance Data, Other Diagnostic Data
Used for: App Functionality
Alternatives to Criticality Idle - Reactor Sim
Looking for apps like Criticality Idle - Reactor Sim? Here are 6 similar apps on the App Store. The highest rated is Below The Layer (5.0/5), and all 6 are free to download.
-
Below The Layer
5.0
-
Interstate Tycoon
-
High Plains Installer
-
Radar Atc Simulator
-
UBOOTSIM
5.0
-
Silicon Evolution
5.0
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Criticality Idle - Reactor Sim | – | Free | August 15, 2026 | |
| Below The Layer | 5.0 / 5 (3) | Free | Oct 5, 2026 | Compare |
| Interstate Tycoon | – | Free | Sep 14, 2026 | Compare |
| High Plains Installer | – | Free | Apr 15, 2026 | Compare |
| Radar Atc Simulator | – | Free | May 30, 2026 | Compare |
| UBOOTSIM | 5.0 / 5 (2) | Free | Oct 19, 2026 | Compare |
| Silicon Evolution | 5.0 / 5 (1) | Free | Mar 17, 2026 | Compare |