DO Calcs Buddy
Education
Free · Designed for iPad
DO Calcs Buddy is your ultimate pump operator's toolkit — designed for firefighters, engineers, and driver/operators to perform accurate and efficient hoseline calculations in classroom and training environments.
Whether you're on the fireground or studying for your D.O. certification, DO Calcs Buddy provides friction loss, pump discharge pressure (PDP), GPM, Nozzle Reaction, and many more topics — all in one clean, intuitive interface.
Best of all — this app is completely customizable to use your department's specific hoses, nozzles, and appliances. Custom coefficients? Take the time to set it up and share the settings with your colleagues easily. Or take advantage of a handful of preset settings to choose from.
Features:
Hoseline Calculator: Customize hose layouts with multiple segments, wyes, and siamese connections in seconds. Account for elevation and any custom nozzles or hoses.
Resource Topics: Quick reference field topics for Driver/Operators like the hand method, standpipes, and many more.
Profile-Based Settings: Save and switch between different department or training configurations for Quiz and Reference Topics
Interactive Quiz Mode: Sharpen your knowledge with randomized D.O. questions on FL, GPM, nozzle reaction, relay pumping, and more - with all numbers randomly generated from the profiles that you customize. Pick any topic you'd like.
Offline Ready: No internet connection required after install.
Designed by a fire service Engineer and Driver/Operator Instructor to assist in teaching and as a handy reference tool for any pump operator's pocket.
DISCLAIMER:
This app is intended as a training and reference tool. Always follow your department's SOPs, manufacturer guidelines, and pump charts during actual operations.
Ratings & Reviews
Added resource topics for standpipes, FDC's, and Phoenix Method. Updated iOS keyboard to be more user friendly on the calculator.
The developer, Max McCoy, 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
- Max McCoy
- Size
- 31.2 MB
- Category
- Education
- 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.
- Age Rating
4+
- 4+
- Copyright
- © 2025 Max McCoy