Criticality Idle - Reactor Sim
Realistic Nuclear Reactor
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
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.
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New marketing URL. No code changes.
The developer, Quantum Fuzz, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Quantum Fuzz, LLC
- Size
- 262.7 MB
- Category
- Simulation
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Night Shift $1.99
- Essential Bundle $4.99
- 2x Offline Efficiency $4.99
- 2x Income and No Ads $7.99
- Zirconium Slab $9.99
- Zirconium Ingot $4.99
- Zirconium Nugget $0.99
- Copyright
- © 2025 Quantum Fuzz, LLC