TruAirspeed vs FRATForm

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).

FRAT Form helps pilots quickly assess flight risk using mnemonics like PAVE and IMSAFE. If you are on a solo mission or a dual flight with an instructor use FRATForm do optimize safety. Users that need this app: -Student pilots who need a simple, structured way to run PAVE before each lesson. -Renters & recreational GA pilots flying Part 91 who don’t have a built-in FRAT from a school or operator. -Owner-operators who fly themselves and want a quick, repeatable preflight risk check. -Pilots at schools/clubs without a formal FRAT needing an organized, consistent process. -CFIs/Check instructors who want instructor-aware scoring and easy summaries for training records. -Flying clubs & grassroots groups standardizing risk assessment across diverse aircraft and member experience. -Backcountry/Weekend flyers where conditions and judgment calls vary flight-to-flight. -Part 91 corporate/department pilots seeking a lightweight supplement to SOPs when a full SMS isn’t provided. -Safety officers and training leads who want a simple tool to encourage risk discussions and capture sign-offs.