FlightLog is coming with an elaborated Theodolite.


  1. Select the cloud distance (right slider)
  2. Rotate your device to align chevrons with the cross to lock on the horizontal axis (horizontal is actually corrected with the Earth curvature according to the cloud distance) : the cross is showing where you’ll fly when you’ll reach the distance.
  3. Pointing the cross above or below the cloud will display the vertical margin with clouds (don’t avoid CBs vertically ! ) and the variometer to achieve that (according your speed selected with the left slider)


  1. Select the cloud distance (right slider)
  2. Aim for the cloud side then click on the PIN button (top right) to lock the cloud position.
  3. Aim for the desired direction you want to fly : it will display the heading and the horizontal margin according to the cloud distance.

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