Isogonic

A flight computer that shows its working.

Isogonic replaces the E6B, the circular slide rule every student pilot has bought since 1940. It runs entirely on the phone, with no account, no subscription and no network calls of any kind.

Weight and balance that is actually a product

Most flight computers either dropped weight and balance or never had it. Isogonic plots the envelope, marks take-off and landing, and tracks the centre of gravity along the whole fuel burn between them.

Burning fuel moves the CG along a curve, not a straight line, so checking only the endpoints can miss an excursion in the middle of the flight. Isogonic checks the entire path, which is what the ACS asks for: within limits during all phases of flight.

Show the work

Tap any answer and it unfolds: every input, every intermediate value, the formula, and the rule of thumb you can say out loud, with the exact error that shortcut carries.

Holding, as the ground sees it

The textbook racetrack is the air path. With wind in it the ground track is a different, lopsided shape. Isogonic draws both, on top of each other.

Correct, and checkable

Every atmospheric constant is derived from first principles rather than copied from a published decimal. At exact ISA conditions it returns exactly zero density altitude.

Built for a cockpit

Its own keypad, never the system keyboard. Big keys that fire on release so turbulence does not. Both orientations. A night mode that goes deeper than Dark.

Not a substitute for your handbook

Isogonic is a calculation and training aid. It is not certified and it does not replace your Pilot’s Operating Handbook, your Aircraft Flight Manual or your aircraft’s current weighing record. The pilot in command remains responsible for the aircraft being loaded and operated within limits.

Personal electronic devices are not permitted in FAA knowledge testing rooms, so Isogonic cannot be used on the written exam. It is built for preparation, for the checkride, and for real flying.

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