# Orifice Flow vs 3D Interpolation

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.

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.

## The numbers

| Metric | Orifice Flow | 3D Interpolation |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/orifice-flow/id479581349/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 37 months |
| Monetization | Paid | Paid |
| Size | 1 MB | 7 MB |
| Requires iOS | 14.3 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kaup Shenoy Associates](https://appshunter.io/developer/460148822) | [Carlos Moura](https://appshunter.io/developer/407501202) |

## What reviewers say

### Orifice Flow

[App page](https://appshunter.io/ios/app/orifice-flow/id479581349)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 3D Interpolation

[App page](https://appshunter.io/ios/app/3d-interpolation/id1000298349)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Orifice Flow free?

Orifice Flow costs $3.99, with no in-app purchases.

### Is 3D Interpolation free?

3D Interpolation costs $9.99, with no in-app purchases.

### Do Orifice Flow or 3D Interpolation have ads?

Neither Orifice Flow nor 3D Interpolation shows ads.

### Which is updated more often, Orifice Flow or 3D Interpolation?

Orifice Flow ships an update every 12 months, and 3D Interpolation every 37 months. Most recently, Orifice Flow was updated on September 9, 2026 and 3D Interpolation on September 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*