Dimension Marker vs Hydraulic Calculator Engineer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dimension Marker
Easily add dimension lines and measurements directly onto photos or sketches. Ideal for home renovation, furniture fitting, or product visualization, it helps avoid confusion with visual measurements.
- Mark dimensions on photos/sketches
- Vertical, horizontal, and arbitrary arrows
- Choice of arrow and marker colors
- Eraser and clear all functions
- Insert photos from album
- Save work to photo album
- Auto-save functionality
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*** 2017 New update is finally here! Thank everyone for the patience *** Dimension Marker makes it easy to mark the dimension of any space or object DIRECTLY on photos or sketches - turning your iPhone/iPod touch into a great assistant whenever, for example: - You need to fit new furniture when you redecorate or renovate your home. - You bump into a nice piece of home accessory and wondered if it fits somewhere in your home. - You need to explain the dimension of a product to your customers, in many cases, it's better to email a picture with marked dimensions than to talk over the phone. Few more examples when you need to remember sizes and dimensions during home improvement or renovation: - You want to pick the biggest possible flat panel TV that best fit the TV cabinet. - You bump into a nice piece of decorative item and wondered if it fits into your bookshelf. - There's a light switch on the wall and you want to find a bookshelf that's either short enough or narrow enough to leave the switch accessible. - Need to measure the sizes of the 6 windows in the 3 bed rooms, living room and dinning room in order to get the right curtain for the right window. - You want to get a new cabinet that's big enough but not blocking the power outlet and the picture hung on the wall. We normally take text notes but sometimes it's confusing. The bed room may have 2 windows and there are 3 walls in the dinning room. Which wall is exactly "wall B" on my note? Which window is "window 1" on my note? I jotted down the "length" of the cabinet, but now I forgot whether I meant the width or height. To avoid mistakes and confusions, nothing's as straight forward as marking the sizes and measurements on the real photo or even a simple sketch. Remember, a picture worth a thousand words. And that's what Dimension Marker's for. KEY FEATURES: - Marks measurements and dimension directly on photos or sketches - Vertical, horizontal and arbitrary arrows - Choice of Black or White arrows - Marker pen in Black or White - Eraser - Clear all sketches at once - Insert photo from Photos Album - Take photo with camera (on iPhones) - Save your note/work to Photo Album - Auto save QUICK TIPS: - Drag arrow heads to adjust arrow lengths (and the angle of arbitrary arrows) - Tab on the arrow text to edit - Drag the arrow body (avoid the text area) to move the arrow - Drag arrows to the buttons panel (or onto the bin) to delete - Press the Black/White square button to toggle new arrow and sketch color
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.
Screenshots
Verdict
The clearest difference is price: Hydraulic Calculator Engineer at Free against Dimension Marker's $0.99. Hydraulic Calculator Engineer also leads on rating (4.3 vs 2.0) and ratings volume (9 vs 2). Dimension Marker's advantage is review sentiment (24% vs 0%) and iOS requirement (8.0 vs 15.0). On update cadence, 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
Hydraulic Calculator Engineer is free to download; Dimension Marker costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Hydraulic Calculator Engineer holds the better App Store score, 4.3 against 2.0. Both are backed by a comparable volume of ratings — 2 and 9 respectively. Written reviews complicate that: 24% of Dimension Marker's written reviews are positive against 0% of Hydraulic Calculator Engineer's, so the app with the better star average is not the one people write more warmly about.
Dimension Marker ships an update every 42 months, Hydraulic Calculator Engineer every 22 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Dimension Marker | Hydraulic Calculator Engineer |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.0 (2 ratings) | 4.3 (9 ratings) — better |
| Positive reviews | 24.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 | 9 — better |
| Update frequency | Every 42 months | Every 22 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Y Lau | Arsosa Network Inc. |
Customer experience
Dimension Marker
Hydraulic Calculator Engineer
In-app purchases
Dimension Marker
No in-app purchases
Hydraulic Calculator Engineer
No in-app purchases
Questions
Is Dimension Marker free?
Is Hydraulic Calculator Engineer free?
Which has better reviews, Dimension Marker or Hydraulic Calculator Engineer?
Do Dimension Marker or Hydraulic Calculator Engineer have ads?
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