Comparison

DO Calcs Buddy vs FirePumpSim

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DO Calcs Buddy

This app helps firefighters and engineers perform hoseline calculations for training and certification. It offers customizable settings for specific departments and includes interactive study modes for various pump operator topics. The tool is designed for offline use and provides quick reference field topics.

Highlights
  • Hoseline Calculator with custom segments
  • Friction loss, PDP, GPM, Nozzle Reaction
  • Customizable hose and nozzle settings
  • Interactive study mode with randomized questions
  • Offline functionality
  • Quick reference field topics
Features
Read full description

DO Calcs Buddy is a customizable Driver/Operator pumping toolkit. Practice hoseline calculations, build hydraulic layouts, review essential concepts, and test your knowledge—all through a clean, visual interface designed for classroom study and non-emergency training. FEATURES: Visual Hydraulic Calculator / Simulator Build custom training layouts using engines, attack engines, hose segments, fog and smoothbore nozzles, wyes, manifolds, siamese connections, standpipes, foam eductors, monitors, hydrants, and master streams. Calculate required pump pressures while accounting for friction loss, appliance loss, elevation, flow, and nozzle pressure. Connect to a hydrant and watch the pressure gauges update in real-time to see how much you can theoretically flow in a situation. Pump Charts Create and organize your own quick-reference pump charts. Import and export individual charts as CSV files, or share complete chart collections using QR codes. Several ready-to-use default charts are also included. Custom Profiles Create apparatus- or department-specific profiles containing your own hoses, nozzles, appliances, coefficients, and preferred values. Save multiple profiles and quickly switch between department, apparatus, or training configurations. Easy QR Code Sharing Share profiles with students, instructors, and colleagues using QR codes. Scan a compatible QR code to import a profile without manually entering every setting. Interactive Study Mode Generate randomized multiple-choice questions using values from your selected profile. Choose one topic or combine multiple categories, including: • Handlines and master streams • Reduced hoselines • Fog and smoothbore nozzle reaction • Smoothbore GPM • Hydrant-flow methods • Relay pumping • Equal and unequal wye layouts • Manifolds and siamese connections • Deck-gun flow calculations Visual diagrams help you interpret each layout, and answer explanations reinforce the formulas and concepts behind the solution. Jump directly to a related reference topic when additional review is needed. Custom Charts Built-In Reference Library Review commonly taught Driver/Operator topics such as friction loss, hose coefficients, elevation pressure, smoothbore flow, nozzle reaction, hydrant flow, relay pumping, LDH, standpipes, siamese appliances, wyes, and manifolds. Offline Ready This app is designed as an offline educational tool. It is completely free, does not collect data, and does not request any permissions other than those necessary for functions like QR scanning. All core app features are completely functional without internet. Designed by a fire service Engineer and Driver/Operator Instructor as a flexible teaching, study, and classroom-training aid.

About

FirePumpSim

This app offers realistic pump-pressure practice for firefighters and driver/operators. It helps users work through visual fireground scenarios, calculate pump pressure, and understand friction loss with real-world fire service hydraulics.

Highlights
  • Realistic pump-pressure practice
  • Visual fireground scenarios
  • Pump pressure calculations
  • Friction loss practice
  • Teaching feedback on hydraulics
  • Scenario library and daily challenges
Features
Read full description

FirePumpSim is a fireground pump training app built for firefighters, driver/operators, instructors, and students who want realistic pump-pressure practice without needing a full training evolution. Work through visual fireground scenarios, calculate pump pressure, practice friction loss, review explanations, and build confidence with real-world fire service hydraulics. FirePumpSim helps users practice common pump operator problems such as: • Single attack lines • Standpipe and FDC operations • Wye layouts • Master streams • Deck gun flow problems • Elevation changes • Appliance loss • Hose length and diameter changes • Nozzle reaction • Wildland and structure protection scenarios Each scenario presents a fireground setup and challenges you to determine the correct answer. After submitting your response, FirePumpSim provides teaching feedback so you can understand the math, not just memorize an answer. FirePumpSim also includes training tools designed for classroom, station, and company-level practice: • Practice Scenarios • Daily Challenge • Printable Scenarios • Scenario Library • Formula reference • Pump card reference Whether you are preparing for driver/operator testing, teaching pump hydraulics, or trying to stay sharp as an engineer, FirePumpSim gives you a simple way to practice realistic fireground calculations anytime. Built by a firefighter/paramedic for real fire service training.

Screenshots

DO Calcs Buddy4 screens
FirePumpSim4 screens

Verdict

The call

The clearest difference is in-app purchases: DO Calcs Buddy at none against FirePumpSim's 1. DO Calcs Buddy also leads on ratings volume (4 vs 1). FirePumpSim's advantage is update cadence (weekly vs monthly) and rating (5.0 vs 4.8). On price, ads, monetization model and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FirePumpSim sells 1 one-off in-app purchase. DO Calcs Buddy asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FirePumpSim holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

DO Calcs Buddy ships an update monthly, FirePumpSim weekly. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

Scorecard4 real differences · 6 level
DO Calcs Buddy versus FirePumpSim: the parameters behind the verdict, then further details
ParameterDO Calcs BuddyFirePumpSim
PriceFreeFree
Rating4.8 (4 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings4 — better1
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size71 MB158 MB
Age rating4+4+
DeveloperMax McCoyDavid Gallaher

Customer experience

DO Calcs Buddy

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

FirePumpSim

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

DO Calcs Buddy

No in-app purchases

1 purchases

FirePumpSim

One-time1
  • Pump Operations Pack 1$1.99

Questions

Is DO Calcs Buddy free?
DO Calcs Buddy is free to download, with no in-app purchases.
Is FirePumpSim free?
FirePumpSim is free to download, with in-app purchases available.
Which has better reviews, DO Calcs Buddy or FirePumpSim?
FirePumpSim is rated higher. DO Calcs Buddy averages 4.8 out of 5 from 4 ratings, while FirePumpSim averages 5.0 from 1 ratings.
Do DO Calcs Buddy or FirePumpSim have ads?
Neither DO Calcs Buddy nor FirePumpSim shows ads.
Which is updated more often, DO Calcs Buddy or FirePumpSim?
DO Calcs Buddy ships an update monthly, and FirePumpSim weekly. Most recently, DO Calcs Buddy was updated on October 9, 2026 and FirePumpSim on October 1, 2026.

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