# Orifice Flow vs PrepTracker

The clearest difference is price: PrepTracker at Free against Orifice Flow's $3.99. Orifice Flow's advantage is chart position (#181 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

PrepTracker is free to download; Orifice Flow costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Orifice Flow | PrepTracker |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/orifice-flow/id479581349/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | — |
| Monetization | Paid | — |
| Best chart rank | **#181** | — |
| Size | 1 MB | 7 MB |
| Requires iOS | 14.3 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kaup Shenoy Associates](https://appshunter.io/developer/460148822) | [Cubed Holdings LLC](https://appshunter.io/developer/6790476382) |

## What reviewers say

### Orifice Flow

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

**Currently charting:** #181 Top Paid · Utilities (US App Store)

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


### PrepTracker

[App page](https://appshunter.io/ios/app/preptracker-emergency-prep/id6790476379)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Orifice Flow free?

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

### Is PrepTracker free?

PrepTracker is free to download, with no in-app purchases.

### Do Orifice Flow or PrepTracker have ads?

Neither Orifice Flow nor PrepTracker shows ads.

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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.*