Comparison

Compressible Gas Flow Calc vs Field Operator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Compressible Gas Flow Calc

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
Read full description

This app does one thing, but it does it well. It will calculate the pressure drops and flow rates for compressible gas flow in a pipe. This app is different from other pressure drop apps in that it does not restrict the results to a certain pressure drop, which treat it as a liquid. There are 3 calculation modes that can be used: -Calculate inlet pressure: This is useful when the user knows they need to deliver a certain amount of a gas against a certain back pressure. Such as filling a tank or vessel. -Calculate outlet pressure: This will determine the residual pressure in the gas at the end of a pipe run. -Calculate flow rate: Not much to be said here, enter the pressures and you get the flow rate. We have used this to calculate free flow of high pressure lines, for example if there is a break in a line (outlet pressure is zero). App includes a full database of standard pipe sizes or you can enter your own size using the Custom selection. There are over 20 gases in the database with viscosity as a function of temperature using Lennard-Jones formulation. Results are based on a modified Newton-Raphson iterative method and have been benchmarked against CFD results. Choose between Imperial or SI units.

About

Field Operator

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
Read full description

Field Operator combines P2’s industry leading field data capture and operations management software with mobile capabilities to help field operators in their daily challenges of remote oil and gas operations with hundreds of wells and equipment to manage. The solution enables quick data validation, capture of images and seamless collaboration from the field to the back office.

Screenshots

Compressible Gas Flow Calc4 screens
Field Operator1 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard5 real differences · 4 level
Compressible Gas Flow Calc versus Field Operator: the parameters behind the verdict, then further details
ParameterCompressible Gas Flow CalcField Operator
Price$3.99Free — better
Rating5.0 (1 ratings) — better4.5 (2 ratings)
Number of ratings12 — better
Update frequencyEvery 12 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.69.0 — better
Further details — not scored
Size1 MB104 MB
Age rating4+4+
DeveloperNiagara Mobile LLCP2 Energy Solutions

Customer experience

Compressible Gas Flow Calc

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Field Operator

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Compressible Gas Flow Calc

No in-app purchases

None

Field Operator

No in-app purchases

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.

Other comparisons