Save fuel and money by leaning your fixed prop engine at cruise – regardless of altitude – easily with PilotGEEK's TachCalc. Aircraft POH's recommend leaning above 5000 feet to protect the engine from damage. TachCalc lets you quickly and easily calculate your target RPM for the power setting desired for your current altitude.

And TachCalc simplifies your fixed prop flight planning by allowing you to determine both the best power setting for cruise at your selected altitude and the TAS to file.

> Improved user interface. Adjust Indicated altitude, Altimeter setting, Outside air temperature and % power utilizing:
o Self-centering sliders
o Direct keyboard entry
o Customizable display units
- Altitude: Feet or Meters MSL
- Altimeter Setting: inHg, mmHg, mBar, hPa
- Temperature: ºC or ºF
- Speed: Kts, MPH, KPH
- Fuel Flow: usGPH, impGPH, LPH
> Calculates and displays
o Engine speed for desired % power
o Pressure Altitude
o Density Altitude
o Indicated Airspeed
o True Airspeed
o Fuel burn at best economy (maximum lean)
> Supports fixed pitch propeller aircraft
> 22 aircraft profiles included (see web page for details)
> Aircraft profiles can be edited to match plane's POH
> User defined aircraft profiles

What’s New

Version 2.0

Works with IOS 9.0 and later
Configurable for international speeds, altimeter settings, temperature and fuel flows
Added new Aircraft Profiles, now 21 available including RV-12, Tecnam P2008, Flight Design CTLS.
Enhanced User Interface

Ratings and Reviews

1.0 out of 5
1 Rating

1 Rating

Adasdsdvv ,

Not supported. Only 180C in database.

Does not work. Not supported. No one to contact. Don't waste your money.

Skymonger ,


There is no way to apply it to moremthan one model plane or engine

App Privacy

The developer, PilotGEEK, LLC, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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