Westwind

An electronic flight bag for general aviation pilots, built by Jof Software LLC

Westwind is an iPad application that brings pre-flight weather briefing, aircraft performance, weight and balance, route planning, and an in-flight moving map into a single workflow for general aviation pilots flying under VFR and IFR.

It is designed for owner-pilots and renters of single- and light twin-engine aircraft who plan their own flights and want the briefing, the numbers, and the map to agree with one another.

What Westwind does

Pre-flight weather briefing

Departure, destination, and alternate weather: METARs, TAFs, and model output statistics (MOS) evaluated at the planned departure and arrival times.
NOTAMs for each airport on the route, and temporary flight restrictions.
En-route hazards along the planned route: AIRMETs, G-AIRMETs, SIGMETs, convective SIGMETs, pilot reports, winds and temperatures aloft, freezing level, and gridded icing and turbulence risk at the planned altitude.
Alternate evaluation against the 1-2-3 rule.
Plain-language summaries of each phase of the flight, generated with the assistance of a third-party AI model and shown alongside the source observations and forecasts they summarize.
Briefings are cached on the device so they remain available in the cockpit without an internet connection.

Aircraft performance, weight and balance

Aircraft profiles with climb, cruise, and descent performance, including published reference data for common general aviation types with the source of each value shown.
Altitude comparison for the planned route: time, fuel, and wind component at each candidate altitude, using forecast winds aloft.
Weight and balance by loading station, with center-of-gravity checks against the aircraft's envelope.

Route planning

Direct, airway, and waypoint routing, with departure, arrival, and approach procedures from FAA data.
Distances computed on the WGS-84 ellipsoid; altitude suggestions that respect the hemispheric rule for the direction of flight.
Offline readiness checks that warn before departure when airport details, diagrams, or approach plates for the route are not stored on the device.

Moving map

VFR sectional and IFR enroute charts, airports with runway and taxiway diagrams, airspace, terrain, and obstacles, downloadable by region for use without an internet connection.
Ownship position from the iPad's GPS or from a connected ADS-B receiver.
ADS-B traffic and FIS-B weather displayed from a compatible portable receiver.

Flight plan filing (planned)

Filing and amending flight plans with flight service from within Westwind is planned, pending access to a flight service integration environment. It is not available in the app today.

Development status

Westwind is in pre-release development. It is used today in internal test builds, including in flight, and a TestFlight beta is planned. It is not yet available on the App Store, and it has no public users.

Company

Westwind is developed and owned by Jof Software LLC, a California limited liability company.

Jof Software LLC
2108 N Street, Suite N
Sacramento, CA 95816
United States