Orifice Flow vs FloPro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Orifice Flow
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.
- 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
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Measurement of fluid flow in pipes and conduits using orifice plates are very common in industrial applications. This app quickly computes the flow rates for liquid and gases based on standard parameters as per the model shown. Users can pick any fluid from a list of fifteen most common fluids used in industrial applications. Therefore, this app can be a very helpful tool for practicing engineers and designers in design and analysis of flows in different applications. A case study on CO2 flow rate is shown in the screen shot. The result is consistent with other methods used by the industry in computation and difference is less than 0.1%. Fluids that are not in the list, users can create a custom fluid with property data and compute the flow rate using the model provided in this app. Custom fluid data can be saved and reloaded every time when custom fluid is selected. Fluids: Air, Steam, Water, Nitrogen, Oxygen, Hydrogen, Helium, CO2, Methane, Ethane, Chlorine, Ammonia, Argon, Hydraulic oil, HFC(R410A), Custom (user's choice). Orifice Type: App gives four different standard orifice design with recommended discharge coefficients as shown in the following screen shot. It also provides the details of the model used in the computation of flow rates for liquid and gases. This model is valid even for nozzles, venturi-flow meters for which the discharge coefficient (Cd) is unity. Measuring Parameters: Fluid inlet temperature and pressure, orifice geometry, pressure differential using standard pressure taps (ISO 5167), are the standard parameters required in the computation. Based on the orifice geometry, recommended discharge coefficient Cd is used. However, users can edit this using manufacturer’s data for more accurate results. App notes provides brief description of different orifice parameters for quick reference. Unit of Measurement: Users can choose different unit of measurement for both flow as well as pressure drop under given unit standard (SI or USCS). This can be conveniently selected while choosing the fluid from the picker list. App notes provides additional guideline with a link for complete documentation on implementation and validation of math-models used with industry examples.
FloPro
This tool helps diagnose gas-related issues by measuring gas pressure and flow, converting it to heat output. It provides data to ensure appliances deliver expected performance, simplifying troubleshooting for technicians and installers.
- Measures gas pressure (psi)
- Measures gas flow (CFH)
- Converts flow to BTU/hr heat output
- Bluetooth connectivity to smart devices
- Generates CSV data files
- Email and print data reports
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Diagnosing or troubleshooting gas related issues at the appliance level is easier than ever with the FloPro-MD. The FloPro-MD removes the guesswork and offers you a means of determining gas pressure (psi), gas flow (CFH) and converting the information to heat output in BTU/hr. By doing so, it allows you to determine if the proper amount of gas is flowing to the equipment and the equipment is delivering the expected output per specifications. Thousands of service technicians and installers, like yourself, are out on the road today troubleshooting issues with gas burning equipment. Most of you use a manometer to determine gas pressure at the equipment, but do you know what the actual flow of gas is in cubic feet per hour (CFH) and the equivalent BTU/hr output capacity of that flowing gas? Probably not. Whether you are performing a start-up on a gas generator, a boiler or responding to a customer complaint that their appliance is not working as it should, you can feel confident that the information collected by the FloPro-MD will put both yours and your customer’s mind at ease. The FloPro-MD is a compact, light-weight, electronic device that can be easily installed in a matter of minutes. The installation could be temporary to verify proper gas flow during start-up and commissioning of gas equipment or for a longer period of time to log information to assist in troubleshooting a new or repeat problem. The FloPro-MD communicates via Bluetooth connectivity with any smart device. With the data that is collected by the device, a csv file is generated that can be emailed to you or your customer or a hard copy printed and submitted with a work report and/or filed.
Screenshots
Verdict
The clearest difference is price: FloPro at Free against Orifice Flow's $3.99. FloPro also leads on rating (5.0 vs 4.0) and update cadence (every 3 months vs every 12 months). 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
FloPro is free to download; Orifice Flow costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
FloPro holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Orifice Flow ships an update every 12 months, FloPro every 3 months. The most recent releases landed on September 9, 2026 and July 5, 2026 respectively.
| Parameter | Orifice Flow | FloPro |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 12 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.3 | 10.3 — better |
| Further details — not scored | ||
| Size | 1 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Kaup Shenoy Associates | Watts Water Technologies, Inc |
Customer experience
Orifice Flow
FloPro
In-app purchases
Orifice Flow
No in-app purchases
FloPro
No in-app purchases
Questions
Is Orifice Flow free?
Is FloPro free?
Which has better reviews, Orifice Flow or FloPro?
Do Orifice Flow or FloPro have ads?
Which is updated more often, Orifice Flow or FloPro?
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