Orifice Flow vs Tank_Level
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.
Tank_Level
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Tank Level – Smart Volume Calculator Easily calculate the liquid volume in your storage tanks with just the measured level. Whether you’re working with fixed roof tanks, floating roof tanks, or other storage types, this app provides fast, accurate, and reliable volume calculations. Key Features: Input tank level to instantly get the liquid volume. Supports cylindrical and storage tanks (vertical/horizontal). Quick and easy interface for field and industrial use. Reduces manual errors in dip tape or gauge readings. Useful for oil & gas, chemical, and water storage facilities. Perfect for: Operators, engineers, and field technicians who need accurate tank volume calculations on-site. Stay efficient. Stay accurate. Calculate your tank volume in seconds!
Screenshots
Verdict
The clearest difference is price: Tank_Level at Free against Orifice Flow's $3.99. Tank_Level also leads on iOS requirement (12.0 vs 14.3). On update cadence, 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
Tank_Level is free to download; Orifice Flow costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Orifice Flow ships an update every 12 months, Tank_Level every 10 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.
| Parameter | Orifice Flow | Tank_Level |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 12 months | Every 10 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.3 | 12.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Kaup Shenoy Associates | GAMAL ABDELNASER GABR GABR |
In-app purchases
Orifice Flow
No in-app purchases
Tank_Level
No in-app purchases
Questions
Is Orifice Flow free?
Is Tank_Level free?
Do Orifice Flow or Tank_Level have ads?
Which is updated more often, Orifice Flow or Tank_Level?
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