Fire Pump Calc vs OCMC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fire Pump Calc
This professional hydraulic calculator assists fire service professionals and students with complex calculations for pump operations. It accurately determines pump discharge pressure, friction loss, elevation changes, and appliance pressure loss, all designed for real-world fireground scenarios. The app works offline and requires no account for immediate use.
- Pump Discharge Pressure (PDP) calculation
- Friction loss for any hose lay
- Elevation gain and loss calculation
- Appliance pressure loss
- Nozzle pressure calculation
- Offline functionality
- No account required
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Fire Pump Calc is the hydraulic reference tool built for the fireground — fast, accurate, and designed by fire service personnel for fire service personnel. STRUCTURAL OPERATIONS Calculate pump discharge pressure for any structural attack scenario. Select nozzle pressure, hose diameter, hose length, flow rate, elevation, and number of appliances. Instant PDP output using industry-standard friction loss formulas. Metric/imperial toggle built in. WILDLAND PUMP SPECS Full reference specs for five verified wildland pumps — Waterax MARK-3, Wick 80-4H, Honda WH20X, CET PFP-23hp, and CET PFP-11hp. Performance curves, engine specs, fuel type, weight, and max head pressure. All data verified against manufacturer documentation. ADVANCED WILDLAND CALCULATOR Purpose-built for wildland initial attack. Select your pump, hose diameter, hose length, elevation, nozzle type, wyes and fittings, water source, and tank fill percentage. Outputs required PDP, GPM at PDP, max hose lay, max elevation, and estimated runtime — with a live indicator showing whether your required PDP is within pump capacity. CUSTOM PUMP BUILDER Add your own pump specs and save them for future reference. Custom pumps appear in both Wildland screens and persist between sessions. BUILT FOR THE JOB No sign-in required. Works fully offline. No ads, no in-app purchases, no external network calls. A mandatory disclaimer is presented on first launch. Built and maintained by Captain Justin Medeiros, Kitimat Firefighters Association.
OCMC
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Welcome to the OCMC Riders Application! Your main application for the Oshawa Competition Motorcycle Club Riders. View at all our events, past and present. An easy place to view the results from completed races.
Screenshots
Verdict
The clearest difference is update cadence: OCMC at monthly against Fire Pump Calc's every 8 months. Fire Pump Calc's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fire Pump Calc ships an update every 8 months, OCMC monthly. Both last shipped on October 1, 2026.
| Parameter | Fire Pump Calc | OCMC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (4 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 8 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.4 |
| Further details — not scored | ||
| Size | 6 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Justin Medeiros | Live Laps |
In-app purchases
Fire Pump Calc
No in-app purchases
OCMC
No in-app purchases
Questions
Is Fire Pump Calc free?
Is OCMC free?
Do Fire Pump Calc or OCMC have ads?
Which is updated more often, Fire Pump Calc or OCMC?
Other comparisons
