# PumpOps — Engine Pressure Calculator > Fire apparatus engine pressure calculator with instant PSI and equation breakdown. (iPhone/iPad app by TREVOR GREENWOOD WILLIAMS.) - Source: https://appshunter.io/ios/app/pumpops/id6798931183 (this page in markdown: same URL + `.md`) - Developer: [TREVOR GREENWOOD WILLIAMS](https://appshunter.io/developer/6798931185) - Category: Utilities, Education - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.0 · 9 MB - Languages: American English - Released: 2026-08-12 - Data updated: 2026-09-23 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/pumpops/id6798931183/reviews.md ## What is PumpOps? Pump calculations in seconds. PumpOps is a fast, dead-simple engine pressure calculator built for fire apparatus engineers and operator candidates. Pick your nozzle, hose, and layout - the pump discharge pressure updates instantly, with the full equation shown so you always know where the number came from. BUILT FOR SPEED - One screen. Instant PSI. - Live equation breakdown: NP + FL + Appliances + Elevation - Friction loss shown per 100' for every hose selection COVERS THE FULL LAYOUT - Fog and smooth bore handline nozzles - Master streams, monitors, deck guns, and ladderpipes - Up to three hose lays, including two- and three-line big water - Appliances: wye, siamese, monitor, ladderpipe, standpipe - Elevation by floor or by feet, above and below grade - Helicopter fill lays included REFERENCE AND TRAINING TOOLS - Interactive formula calculators: friction loss, nozzle discharge, standpipe ops, relay pumping, and more - Hose coefficient calculator with a live flow scale - Nozzle GPM and pressure quick-reference tables - Over-pressure warning when a layout exceeds safe pumping limits MAKE IT YOURS - Save and name your favorite hose lays - Drag to reorder presets so your most-used lays are on top - Color, dark, and light themes with adjustable display size TRAIN WITH CONFIDENCE Every calculation follows standard fireground hydraulics used in apparatus operator training, verified against department-style pump charts. DISCLAIMER: PumpOps is for training purposes only. It is not a substitute for department policy, certified training, or fireground judgment. Always verify pressures against your department's current procedures. ## Key features - Instant PSI calculation - Live equation breakdown - Friction loss per 100' - Supports various nozzles and hose lays - Appliance and elevation calculations - Interactive formula calculators - Customizable themes and presets ## Frequently asked questions about PumpOps ### What is PumpOps? PumpOps is a free utility app designed to quickly calculate engine pressure for fire apparatus engineers and operator candidates. It provides instant PSI updates and a clear breakdown of the hydraulic equation used. ### Does PumpOps have ads? No, PumpOps does not contain advertisements. It is a completely free application. ### What devices is PumpOps compatible with? PumpOps is available on Apple Watch, iPhone, iPad, and iPod devices, supporting a wide range of iOS hardware. ### How often is PumpOps updated? The app was last updated on September 16, 2026, indicating a commitment to maintenance and potential future improvements. ### What kind of calculations does PumpOps perform? PumpOps calculates pump discharge pressure based on nozzle, hose, and layout selections. It also includes interactive calculators for friction loss, nozzle discharge, standpipe operations, and relay pumping. ### Can I save my hose lay configurations in PumpOps? Yes, PumpOps allows you to save and name your favorite hose lays. You can also reorder these presets for quick access to your most frequently used configurations. ### What is the age rating for PumpOps? PumpOps has an age rating of 4+, making it suitable for a broad audience, including younger users interested in learning about fire hydraulics. ### Does PumpOps provide training resources? Yes, PumpOps includes reference and training tools such as interactive formula calculators, a hose coefficient calculator, and quick-reference tables for nozzle GPM and pressure. ## Version history (last 5 releases) ### 1.4 — 2026-09-16 APPLE WATCH APP The main screen, on your wrist. Nozzle, three hose lays, appliances and elevation, and the pump pressure as you turn the crown — the same numbers the phone gives you, off the same department friction loss tables, with the same warning when you go over the ceiling. It runs on the watch alone, so you do not need the phone out of your pocket at the panel. CHECKLIST Your own lists for the things you do every time — coming on duty, packing for an out-of-station shift, packing to go home. Name a list, add your items, tick them off. Reset clears the ticks and keeps the list, and stamps the date you reset it so you know it was today's run. Keep as many lists as you want. GARDEN HOSE FOG NOZZLE 3/4" In the nozzle list at 10 GPM and 50 PSI, for the times you are pumping something that is not a fire hose. CHANGE OVER A change over you share no longer counts the boxes at the bottom. Most of that list does not apply on any given shift, and "6 of 13" read to the oncoming engineer like seven things nobody did. Also: What's New now recaps 1.3, 1.2 and 1.1 underneath the current release, in case you skipped an update. ### 1.3 — 2026-09-08 PRACTICE Work real engineer exam problems on the panel. Type your answer, and if you miss it the worked math comes up line by line. Streak, best, correct and skipped are all tracked, and you can pass on a lay without it counting against you. CHANGE OVER A shift hand-off checklist - fuel and fluids, washed, logs, maintenance, damage, mechanic notifications, repairs, routine work, leaks, SCBA bottles, missing equipment and rig quirks. Add a note to any item, add your own items, save it, and look back at the ones you have already filed. Share the whole thing as text to the oncoming engineer. APPARATUS INFO Save your rig's apparatus card - identity, dimensions and weight, chassis and drivetrain, pumps, fluids, tanks and agents. Mark the one you ride and its tank capacity sets Tank Size for you. Share a profile and anyone with PumpOps who opens the link gets it added to their own list. HOW TO USE THIS APP Every feature and what it is for, at the top of Settings. NIGHT MODE Dimmed red on black, no white and no glow, for working the panel after dark without wrecking your night vision. Also: the version and build number now show at the bottom of Settings, so a bug report can say which build it came from. ### 1.2 — 2026-08-27 Notes - a notebook under the menu for anything worth remembering. Search it, and it comes along in your backup. Tank time - see how long your booster tank lasts at the flow you're pumping. Lay notes - pin a reminder to any preset or saved lay. It shows on the home screen whenever that lay is loaded. Recent - your last five lays, one tap away under the star. Backup - share a copy of your settings, saved lays, notes and hose test record. Fixed: the screen could drift side to side and cut off the right edge, especially at larger text sizes. Fixed: the header no longer resizes or clips on Large and Extra Large text sizes, and the update screen is always dismissable. ### 1.1 — 2026-08-26 • Hose Testing — new annual test worksheet with per-hose-type dates, test pressures, and a condensed LACoFD policy reference • Task Force Tips monitor nozzles added (75 PSI NP) • Search — instantly find presets, calculators, and pages • Lay names — the calculator now shows which preset or saved lay you're viewing • Hose coefficient scale now tracks equivalent flows past 1000 GPM • Over-pressure warning now cites the policy reference • Refined logo and splash screen • Bug fixes and polish ### 1.0 — 2026-08-12 No release notes. ## Apps similar to PumpOps | App | Rating | Price | Category | | --- | --- | --- | --- | | [LA County EMS Drug Doses](https://appshunter.io/ios/app/la-county-ems-drug-doses/id1500636116) | 3.7 (6) | Free | Utilities | | [Rail Crossing Locator](https://appshunter.io/ios/app/rail-crossing-locator/id643005214) | 2.6 (155) | Free | Utilities | | [ArcGIS QuickCapture](https://appshunter.io/ios/app/arcgis-quickcapture/id1451433781) | 4.3 (35) | Free | Utilities | | [CMC Field Guide](https://appshunter.io/ios/app/cmc-field-guide/id426955029) | 4.0 (24) | Free | Utilities | | [GPS Land Measurement & Survey](https://appshunter.io/ios/app/gps-land-measurement-and-survey/id591577052) | 4.5 (3,006) | Free | Utilities | | [QuietCool Smart Control](https://appshunter.io/ios/app/quietcool-smart-control/id1481132594) | 4.7 (14,664) | Free | Utilities | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-23.*