TruAirspeed vs Calculator for Flight

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).

Calculator for Flight: The calculation of time, as well as commonly used in the calculation of the flight.In particular non-precision approach (VOR/DME, NDB/DME, LOC) for the descent profile calculation, making a more accurate non-precision approaches. It's free to get registration key. I would like to know how many people use this software. If you don't want to register, just click "continue", no function limitation. To Registration: 1.Figure 1, fill in the registration information. 2.Click "GetKey" to get key automatically, 3.then "Continue". 60进制计算器：主要用来累加飞行记录本中的飞行时间。 飞行计算器：提供60进制计算，以及飞行中常用的计算。 特别是非精密进近(VOR/DME,NDB/DME,LOC)的下降剖面计算，使得非精密进近更加准确。 注册是免费的。我只想统计一下有多少人使用这个软件。 注册方法： 1.如图1，填写注册信息。 2.点击"GetKey"获取注册码, 3.然后"Continue"。