Hydraulic Calculator Engineer vs FirstApps QR Code Generator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hydraulic Calculator Engineer
This app offers a suite of hydraulic calculations for technicians and engineers. It simplifies complex hydraulics by automatically computing results based on user-entered values, eliminating the need for manual formula application.
- Cylinder Calculation
- Power Calculation
- Pressure Difference
- Piston Diameter
- Speed Calculation
- Lifting Time
- Volume Flow
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Hydraulic Engineer Calculators is a practical hydraulic engineering calculator and formula app for engineers, technicians, students, contractors, operators, and anyone working with fluid flow, pipes, pumps, pressure, open channels, hydraulic cylinders, or fluid mechanics. Quickly enter your values, select units, calculate an estimate, review result details, and check the formula used. Hydraulic calculators included: Flow & Pipe Calculators - Pipe Flow Velocity - Calculate fluid velocity from flow rate and pipe diameter - Flow Rate - Calculate volumetric flow from flow area and average velocity - Required Pipe Diameter - Estimate pipe diameter from design flow and velocity - Reynolds Number - Calculate Reynolds number for internal fluid flow Head Loss Calculators - Darcy-Weisbach Head Loss - Estimate pipe friction head loss - Hazen-Williams Head Loss - Estimate water pipe friction loss - Minor Loss - Calculate losses from fittings, valves, entrances, exits, and components Pressure & Head Calculators - Pressure to Head - Convert pressure to hydraulic head - Head to Pressure - Convert hydraulic head to pressure - Hydrostatic Pressure - Calculate pressure caused by fluid depth - Bernoulli Total Head - Calculate total hydraulic head Pump Calculators - Pump Power - Estimate hydraulic pump power from flow, head, and efficiency - Pump Head from Pressure - Calculate pump head from pressure difference - NPSH Available - Estimate Net Positive Suction Head Available Open Channel Flow Calculators - Manning Rectangular Channel - Estimate rectangular channel flow - Froude Number - Calculate the Froude number - Critical Depth - Estimate critical water depth - Orifice Flow - Calculate fluid discharge through an orifice Hydraulic System Calculators - Water Hammer Pressure - Estimate pressure rise from a rapid velocity change - Hydraulic Cylinder Force - Calculate cylinder force from pressure and piston area - Hydraulic Cylinder Speed - Calculate piston speed from flow rate and bore diameter Fluid Properties Calculator - Specific Gravity - Calculate specific gravity from fluid density Useful for: - Hydraulic engineering - Fluid mechanics - Pipe flow and pipe sizing - Water flow and pressure - Head loss and pipe friction - Pump systems and pump power - NPSH calculations - Open channel flow - Hydraulic cylinders - Water hammer - Irrigation, plumbing, water, and wastewater systems - Civil and mechanical engineering Supported units include: - m, mm, cm, ft, in - m², cm², mm², ft², in² - m³/s, m³/h, L/s, L/min, US gpm, ft³/s - Pa, kPa, MPa, bar, psi - m/s, ft/s - W, kW, hp Built-in formula guide Each calculator includes its formula, and the app links to a Hydraulic Engineer Guide with additional information about formulas, variables, units, calculation steps, practical uses, and important considerations. Selected calculators also include dynamic diagrams to help visualize values used in pipe, pressure, head, open channel, tank, and hydraulic cylinder calculations. Simple workflow: - Choose a calculator - Enter your known values - Select units - Tap Calculate - Review the result and details - Check the formula - Open the related guide for more information The built-in search makes it easy to find a specific hydraulic calculator by category or name. Important disclaimer These calculators provide preliminary hydraulic estimates only. Results are not a substitute for professional engineering judgment, certified calculations, manufacturer specifications, site-specific analysis, or applicable codes and standards. Always verify input values, units, fluid properties, pipe specifications, equipment limitations, safety factors, operating conditions, site conditions, and governing requirements before using a calculation for design, procurement, installation, testing, operation, maintenance, or any safety-critical application.
FirstApps QR Code Generator
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QR Generator turns links, WiFi logins and more into high-quality QR codes, instantly. Type, and the code appears as you go. Save it to Photos or share it in one tap. SEVEN KINDS OF QR CODES • Link: any web address, with https:// or http:// • WiFi: network name, password and security type, so guests join with one scan • Phone: start a call • SMS: a number with an optional ready-written message • Email: an address with an optional subject • Location: latitude and longitude of a place • Text: any plain message BUILT FOR RELIABLE SCANNING Every code uses the highest error correction level, so it still scans when it is small, printed, or slightly damaged. Exported images are sharp, with the standard white border scanners expect, ready for print or screen. SAVE AND SHARE • Save to Photos or share via AirDrop, Messages, Mail or any app • Images are named after their content, like "WiFi Cafe Guest.png" • Keep codes in your saved list and edit them later PRIVATE BY DESIGN No account, no tracking, no ads. QR Generator works entirely on your device; your codes and saved list never leave it. WiFi passwords are hidden in previews and in your saved list. DESIGNED FOR IPHONE AND IPAD A clean, focused interface with Dark Mode and support for larger text sizes.
Screenshots
Verdict
The clearest difference is update cadence: FirstApps QR Code Generator at every 4 months against Hydraulic Calculator Engineer's every 22 months. Hydraulic Calculator Engineer's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Hydraulic Calculator Engineer ships an update every 22 months, FirstApps QR Code Generator every 4 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.
| Parameter | Hydraulic Calculator Engineer | FirstApps QR Code Generator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (9 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 22 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 21 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Arsosa Network Inc. | First Apps |
In-app purchases
Hydraulic Calculator Engineer
No in-app purchases
FirstApps QR Code Generator
No in-app purchases
Questions
Is Hydraulic Calculator Engineer free?
Is FirstApps QR Code Generator free?
Do Hydraulic Calculator Engineer or FirstApps QR Code Generator have ads?
Which is updated more often, Hydraulic Calculator Engineer or FirstApps QR Code Generator?
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