The Optimise Altitudes page displays the time interval and fuel used for each 1000ft increment for each stage in the flight plan, up to the service ceiling entered in the currently selected aircraft model.
Tap a row to select and apply the altitude to a particular flight plan stage.
Scroll down to view the list for subsequent stages of a multi-stage flight plan.
Also note that AvPlan will only optimise up to the highest sensible altitude; for short flights where Top of Climb coincides with Top of Descent, the optimiser will not show a result above that altitude.
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Help Centre (Tap and hold to open the Link)