Orifice Flow vs 3D Interpolation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
3D Interpolation
Calculate key directional drilling parameters like TVD, coordinates, and displacement. This tool aids drilling engineers and students in oil well directional drilling by interpolating survey data.
- Calculate TVD, N/S, E/W coordinates
- Determine Horizontal Displacement
- Calculate Dog-Leg Severity
- Measure Build-Up Rate
- Calculate Turn Rate
- Interpolate parameters between survey stations
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The 3D Interpolation provides an useful tool to calculate projections TVD (True Vertical Depth), N/S and E/W coordinates, Horizontal Displacement, Dog-Leg Severity, Build-Up Rate (Angle Rate, Intensity) and Turn Rate and also the Interpolation of these parameters between two well planning sections or survey stations defined by Measured Depth, Inclination and Azimuth as entry parameters in the directional drilling of oil wells. Calculations Method: Minimum Curvature Length Units: Foot and Meter (Metre) Intensity Units: degree/100ft, degree/10m, degree/30m and degree/100m Our goal was to create a low-cost application with the help of experts to share with drilling engineers, technicians, drillers, students and teachers of drilling engineering. You can contribute with suggestions for improvements, correcting the translation to english, reporting bugs and sharing it with your friends. Thanks DISCLAIMER: These tools & materials are provided 'as is' without warranties of any kind, express or implied. Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools. Any use you choose to make of these tools & materials is undertaken by you entirely at you own risk.
Screenshots
Verdict
The clearest difference is review sentiment: Orifice Flow at 100% against 3D Interpolation's 0%. Orifice Flow also leads on price ($3.99 vs $9.99) and update cadence (every 12 months vs every 37 months). 3D Interpolation's advantage is iOS requirement (12.0 vs 14.3). On ads, in-app purchases, monetization model 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
Orifice Flow costs $3.99 and 3D Interpolation $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Orifice Flow ships an update every 12 months, 3D Interpolation every 37 months. The most recent releases landed on September 9, 2026 and September 2, 2026 respectively.
| Parameter | Orifice Flow | 3D Interpolation |
|---|---|---|
| Price | $3.99 — better | $9.99 |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 12 months — better | Every 37 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.3 | 12.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Kaup Shenoy Associates | Carlos Moura |
Customer experience
Orifice Flow
3D Interpolation
In-app purchases
Orifice Flow
No in-app purchases
3D Interpolation
No in-app purchases
Questions
Is Orifice Flow free?
Is 3D Interpolation free?
Do Orifice Flow or 3D Interpolation have ads?
Which is updated more often, Orifice Flow or 3D Interpolation?
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