TruAirspeed

Name: TruAirspeed
Rating: 4.1 (8 reviews)
Author: James Petty

By: James Petty

Utilities

Features & Capabilities

TruAirspeed is a True Airspeed Calculator for the iPhone and iPad. It's a bit different from other true airspeed calculators, in which the pressure altitude is an input. This requires resetting the altimeter to the standard sea level pressure of 29.92"Hg to read the pressure altitude. With TruAirspeed, you input the indicated altitude and the Kollsman window's pressure setting — the app then calculates the pressure altitude, density altitude, true airspeed and mach number for you.

The calculations involved take full account of compressibility effects, but not shock waves, so it's limited to subsonic, non-transonic flight only.

You have a choice of units for inputs and results, and you may choose either a calculator-style keypad (top row: 7-8-9) or a telephone-style keypad (top row: 1-2-3). You may also set a correction factor for your bird's airspeed indicator/pitot-static system, if you know it (mine is 0.95).

User Growth & Download Statistics

App

By:

James Petty

Rating:

4.10

(8)

Version:

2.1 Last updated: 2025-07-08

Version code:

876205692

Creation date:

2014-04-14

Compatible devices:

Size:

8.33MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 443,555 ▼ 3,202

For Developers

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Contact the developer

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Developed by:

James Petty

Apple Apps Store

https://apps.apple.com/us/app/truairspeed/id855269892

User Reviews

I can’t find how to change knots to miles per hour which my airspeed indicator is calibrated in?

by to*****, 2024-09-05

Another useful offering by Mr. Petty. Thank you sir. I’m enjoying tinkering with Benchmark too. As for the one user saying there is no way to change units; there is. Tap the little “i” in the corner and drill down. As for the other claiming the app is inaccurate, if you mix up C and F, you get a big error (10 knots on a sample I just did).