• We've completed testing of iOS 14. Logbook Pro has no issues observed. APDL's only issue is the Weather Map is crashing. We are working on an update for the crash at this time.

Column Math?


Mar 2, 2006
Southern California
What's the chance of a feature to do limited mathematical operations with custom columns? I'd like to enter beginning and end Hobbs and/or Tach times (especially in the cool new iPhone App) and have them subtract end from beginning to give me an elapsed time or duration. This could be implemented as an option for flight duration, along with the block time and takeoff/land options.

I know this feature would be of limited use...mostly for those of us trying to track time on one particluar airplane (mine). Certainly, the airline dudes wouldn't be interested...unless they own their own airplanes. However, there might be uses for such arithmatic that I haven't thought of.

I have been keeping tach and hobbs time, as well as fuel and oil added and, while I realize your program is not optimized for aircraft maintenance, it would be nice to dump my simple spreadsheet and keep all the info together.

Thanks for a great program,
Gary Aldrich