# Compressible Gas Flow Calc vs Field Operator

The clearest difference is price: Field Operator at Free against Compressible Gas Flow Calc's $3.99. Field Operator also leads on update cadence (every 2 months vs every 12 months) and iOS requirement (9.0 vs 15.6). Compressible Gas Flow Calc's advantage is rating (5.0 vs 4.5). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Field Operator is free to download; Compressible Gas Flow Calc costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Compressible Gas Flow Calc holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Compressible Gas Flow Calc ships an update every 12 months, Field Operator every 2 months. Both last shipped on October 11, 2026.

## The numbers

| Metric | Compressible Gas Flow Calc | Field Operator |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/compressible-gas-flow-calc/id900600984/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/field-operator/id1436635281/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 104 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Niagara Mobile LLC](https://appshunter.io/developer/1039399999) | [P2 Energy Solutions](https://appshunter.io/developer/1056792970) |

## What reviewers say

### Compressible Gas Flow Calc

[App page](https://appshunter.io/ios/app/compressible-gas-flow-calc/id900600984)

Calculates pressure drops and flow rates for compressible gas flow in pipes. Offers three modes: calculate inlet pressure, outlet pressure, or flow rate. Supports custom pipe sizes and a database of over 20 gases.

**Highlights:** Calculate inlet pressure, Calculate outlet pressure, Calculate flow rate, Standard and custom pipe sizes, Database of 20+ gases, Imperial or SI units

**Features:** macOS Compatibility

**In-app purchases:** none


### Field Operator

[App page](https://appshunter.io/ios/app/field-operator/id1436635281)

This app streamlines remote oil and gas operations by enabling field operators to capture and manage data from hundreds of wells and equipment. It facilitates quick data validation, image capture, and seamless collaboration between field teams and the back office.

**Highlights:** Field data capture, Operations management, Remote well management, Equipment management, Image capture, Team collaboration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Compressible Gas Flow Calc free?

Compressible Gas Flow Calc costs $3.99, with no in-app purchases.

### Is Field Operator free?

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

### Which has better reviews, Compressible Gas Flow Calc or Field Operator?

Compressible Gas Flow Calc is rated higher. Compressible Gas Flow Calc averages 5.0 out of 5 from 1 ratings, while Field Operator averages 4.5 from 2 ratings.

### Do Compressible Gas Flow Calc or Field Operator have ads?

Neither Compressible Gas Flow Calc nor Field Operator shows ads.

### Which is updated more often, Compressible Gas Flow Calc or Field Operator?

Compressible Gas Flow Calc ships an update every 12 months, and Field Operator every 2 months. Most recently, Compressible Gas Flow Calc was updated on October 11, 2026 and Field Operator on October 11, 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.*