Comparison

Orifice Flow vs Hydrostatic Pressure Calc

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

Head to head
About

Orifice Flow

Calculate fluid flow rates in pipes and conduits using orifice plates. Supports common industrial fluids and custom fluid properties, with adjustable units and orifice types. Ideal for engineers and designers.

Highlights
  • Fluid flow rate computation
  • Supports 15 common industrial fluids
  • Custom fluid property input and saving
  • Multiple orifice plate types
  • Adjustable units (SI/USCS)
  • Detailed computation model documentation
Features
Read full description

Measurement of fluid flow in pipes and conduits using orifice plates are very common in industrial applications. This app quickly computes the flow rates for liquid and gases based on standard parameters as per the model shown. Users can pick any fluid from a list of fifteen most common fluids used in industrial applications. Therefore, this app can be a very helpful tool for practicing engineers and designers in design and analysis of flows in different applications. A case study on CO2 flow rate is shown in the screen shot. The result is consistent with other methods used by the industry in computation and difference is less than 0.1%. Fluids that are not in the list, users can create a custom fluid with property data and compute the flow rate using the model provided in this app. Custom fluid data can be saved and reloaded every time when custom fluid is selected. Fluids: Air, Steam, Water, Nitrogen, Oxygen, Hydrogen, Helium, CO2, Methane, Ethane, Chlorine, Ammonia, Argon, Hydraulic oil, HFC(R410A), Custom (user's choice). Orifice Type: App gives four different standard orifice design with recommended discharge coefficients as shown in the following screen shot. It also provides the details of the model used in the computation of flow rates for liquid and gases. This model is valid even for nozzles, venturi-flow meters for which the discharge coefficient (Cd) is unity. Measuring Parameters: Fluid inlet temperature and pressure, orifice geometry, pressure differential using standard pressure taps (ISO 5167), are the standard parameters required in the computation. Based on the orifice geometry, recommended discharge coefficient Cd is used. However, users can edit this using manufacturer’s data for more accurate results. App notes provides brief description of different orifice parameters for quick reference. Unit of Measurement: Users can choose different unit of measurement for both flow as well as pressure drop under given unit standard (SI or USCS). This can be conveniently selected while choosing the fluid from the picker list. App notes provides additional guideline with a link for complete documentation on implementation and validation of math-models used with industry examples.

About

Hydrostatic Pressure Calc

Quickly calculate hydrostatic pressure at any depth with this physics tool. It offers instant results, supports various units, and displays the relevant formulas for reference. Optimized for ease of use and accuracy.

Highlights
  • Instant hydrostatic pressure calculation
  • Supports multiple input units
  • Includes hydrostatic pressure formulas
  • Results are copyable
  • High precision up to 16 decimal places
  • Lightweight and optimized
Features
Read full description

Hydrostatic Pressure Calculator is a physics/math calculator used to find hydrostatic pressure at a certain depth quickly and easily. Features: - Instant calculation - Results are copyable to other apps - Formulas are included as references - Supports up to 16 decimal places - Supports various units for each input - Lightweight app with a small size, optimized for everyday use Hydrostatic Pressure is the pressure exerted by a fluid at equilibrium at a given point within the fluid, due to the force of gravity. Hydrostatic pressure increases in proportion to depth measured from the surface because of the increasing weight of fluid exerting downward force from above. Each particle of a liquid is subjected to a gravitational force directed towards the Earth. The deeper it is located, the more particles are above it, resulting in higher fluid pressure. The value of hydrostatic pressure does not depend on the size and shape of the tank, but only on the depth. Therefore, the same hydrostatic pressure will be present in a huge swimming pool and a thin pipe, provided they have the same height. Hydrostatic pressure formula: p = ρ * g * h where: p - hydrostatic pressure ρ - density of fluid g - gravitational acceleration (the average value for Earth is g = 9.80655 m/s²) h - depth Thank you for your support, and feel free to visit nitrio.com for more apps for your iOS devices.

Screenshots

Orifice Flow4 screens
Hydrostatic Pressure Calc4 screens

Verdict

The call

The clearest difference is rating: Hydrostatic Pressure Calc at 5.0 against Orifice Flow's 4.0. Hydrostatic Pressure Calc also leads on price ($2.99 vs $3.99). Orifice Flow's advantage is update cadence (every 12 months vs every 31 months). On ratings volume, ads, in-app purchases and monetization model 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

Orifice Flow costs $3.99 and Hydrostatic Pressure Calc $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Hydrostatic Pressure Calc holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Orifice Flow ships an update every 12 months, Hydrostatic Pressure Calc every 31 months. The most recent releases landed on September 9, 2026 and June 25, 2026 respectively.

Scorecard3 real differences · 7 level
Orifice Flow versus Hydrostatic Pressure Calc: the parameters behind the verdict, then further details
ParameterOrifice FlowHydrostatic Pressure Calc
Price$3.99$2.99 — better
Rating4.0 (1 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyEvery 12 months — betterEvery 31 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.313 — better
Further details — not scored
Size1 MB1 MB
Age rating4+4+
DeveloperKaup Shenoy AssociatesTan Chia Ling

Customer experience

Orifice Flow

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Hydrostatic Pressure Calc

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

In-app purchases

None

Orifice Flow

No in-app purchases

None

Hydrostatic Pressure Calc

No in-app purchases

Questions

Is Orifice Flow free?
Orifice Flow costs $3.99, with no in-app purchases.
Is Hydrostatic Pressure Calc free?
Hydrostatic Pressure Calc costs $2.99, with no in-app purchases.
Which has better reviews, Orifice Flow or Hydrostatic Pressure Calc?
Hydrostatic Pressure Calc is rated higher. Orifice Flow averages 4.0 out of 5 from 1 ratings, while Hydrostatic Pressure Calc averages 5.0 from 1 ratings.
Do Orifice Flow or Hydrostatic Pressure Calc have ads?
Neither Orifice Flow nor Hydrostatic Pressure Calc shows ads.
Which is updated more often, Orifice Flow or Hydrostatic Pressure Calc?
Orifice Flow ships an update every 12 months, and Hydrostatic Pressure Calc every 31 months. Most recently, Orifice Flow was updated on September 9, 2026 and Hydrostatic Pressure Calc on June 25, 2026.

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