Air Flow Conversion Calculator vs ULT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Air Flow Conversion Calculator
Easily calculate air velocity and airflow volume for various duct types. Input dimensions and units, and get instant results for HVAC and ventilation applications.
- Calculate air velocity and airflow volume
- Support for circular and rectangular ducts
- Multiple unit options for velocity, volume, and dimensions
- Instant result display
- Useful for HVAC and ventilation
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Air Flow Conversion Calculator calculate the rate of displacement of air or gas at a specific location. - Enter the air velocity or volume airflow. - Choose circular or rectangular duct and type the required dimension(s), then select the appropriate units. - Result will be displayed instantly. Airflow Value:- Velocity Units: -fl/min (LFM) -m/s -miles/hr (MPH) Volume Airflow Units: -ft3/min (CFM) -m3/hr -L/s Dimension Units: -in -foot -mm -cm -m Air velocity (distance traveled per unit of time) is usually expressed in Linear Feet per Minute (LFM). By multiplying air velocity by the cross section area of a duct, you can determine the air volume flowing past a point in the duct per unit of time. Volume flow is usually measured in Cubic Feet per Minute (CFM). Example Concept of Air Velocity can be used in air conditioning, heating and ventilating work. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
ULT
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This app can be used to perform important air extraction calculations quickly and easily.
Screenshots
Verdict
The clearest difference is price: ULT at Free against Air Flow Conversion Calculator's $2.99. ULT also leads on update cadence (every 14 months vs every 47 months). On ads, in-app purchases, device support and iOS requirement 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
ULT is free to download; Air Flow Conversion Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Air Flow Conversion Calculator ships an update every 47 months, ULT every 14 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.
| Parameter | Air Flow Conversion Calculator | ULT |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.5 (11 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 47 months | Every 14 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 8 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Nitrio | Stefan Jakschik |
In-app purchases
Air Flow Conversion Calculator
No in-app purchases
ULT
No in-app purchases
Questions
Is Air Flow Conversion Calculator free?
Is ULT free?
Do Air Flow Conversion Calculator or ULT have ads?
Which is updated more often, Air Flow Conversion Calculator or ULT?
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