# Orifice Flow vs Nitrox Blender & Calculator

The clearest difference is rating: Nitrox Blender & Calculator at 4.5 against Orifice Flow's 4.0. Nitrox Blender & Calculator also leads on price ($0.99 vs $3.99) and iOS requirement (10.0 vs 14.3). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

Orifice Flow costs $3.99 and Nitrox Blender & Calculator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Nitrox Blender & Calculator holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Orifice Flow ships an update every 12 months, Nitrox Blender & Calculator every 9 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | Orifice Flow | Nitrox Blender & Calculator |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/orifice-flow/id479581349/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/nitrox-blender-and-calculator/id986513867/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 9 months** |
| Monetization | Paid | Paid |
| Size | 1 MB | 85 MB |
| Requires iOS | 14.3 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kaup Shenoy Associates](https://appshunter.io/developer/460148822) | [ComputerWare](https://appshunter.io/developer/475216885) |

## 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


### Nitrox Blender & Calculator

[App page](https://appshunter.io/ios/app/nitrox-blender-and-calculator/id986513867)

This app helps divers plan their dives by calculating maximum operating depth, optimal oxygen percentage, and equivalent air depth. It also assists in gas mixing for filling tanks, determining the required mix or the resulting blend.

**Highlights:** Calculate MOD, Calculate optimal oxygen percentage, Calculate equivalent air depth, Gas mixing calculations for tank fills, Determine required mix for desired blend, Calculate resulting mix from existing blend

**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 Nitrox Blender & Calculator free?

Nitrox Blender & Calculator costs $0.99, with no in-app purchases.

### Which has better reviews, Orifice Flow or Nitrox Blender & Calculator?

Nitrox Blender & Calculator is rated higher. Orifice Flow averages 4.0 out of 5 from 1 ratings, while Nitrox Blender & Calculator averages 4.5 from 2 ratings.

### Do Orifice Flow or Nitrox Blender & Calculator have ads?

Neither Orifice Flow nor Nitrox Blender & Calculator shows ads.

### Which is updated more often, Orifice Flow or Nitrox Blender & Calculator?

Orifice Flow ships an update every 12 months, and Nitrox Blender & Calculator every 9 months. Most recently, Orifice Flow was updated on November 1, 2026 and Nitrox Blender & Calculator on November 1, 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.*