CCR MOD
Sports
Free · Designed for iPad. Not verified for macOS.
CCR trimix MOD calculator with blending guide and pre-dive checklist. Works offline. No account required.
CR MOD is a dive planning tool for closed-circuit rebreather divers using trimix or nitrox fills. It runs entirely on your device — no internet connection required.
MOD Calculator
Enter your oxygen and helium percentages and your target PPO₂ to instantly see the maximum operating depth for your gas mix. The calculator evaluates all three limiting factors simultaneously — PPO₂, gas density, and equivalent narcotic depth (END) — and tells you which one is constraining your dive.
Trimix Blending Calculator
Calculate the exact steps needed to blend a trimix fill from your current tank contents. Enter the current mix and pressure, enter your target mix and pressure, and receive a step-by-step blending sequence: bleed, add helium, add oxygen, top with air.
Pre-dive Checklist
A CCR pre-dive checklist covering cell dates, scrubber time, cylinder pressures, O-rings, loop integrity, negative and positive pressure tests, MAVs, ADV, and more. Checklist state is saved between sessions.
Settings
Switch between metric and imperial display units. Configure the maximum gas density limit, maximum END, and gas component densities.
Safety notice: While reasonable care has been taken to ensure accuracy, independent verification of all results is strongly recommended. Using this application without appropriate CCR training and without verifying results may result in serious injury or death.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, BOMBIMI, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- BOMBIMI
- Size
- 3.5 MB
- Category
- Sports
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 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+
- Copyright
- © 2026 Martin Slater