The E6B flight computer
A modern E6B for student, private and instrument pilots and flight instructors. Type a few numbers, read the answer at arm's length.
iPhone. Works offline.
Fast number entry
A big in-app keypad, so a few taps give you the answer.
Huge results
The result is the largest thing on screen, readable at arm's length.
Fully offline
No account and no signal needed. Everything runs on your iPhone.
Saved aircraft
Weight and balance for your own aircraft
Save an aircraft profile with its weights, arms and envelope. Crab Angle shows total weight, CG and the takeoff and landing points on the CG envelope chart.
N172SP in the screenshots is a sample profile, not data for a real aircraft.
Beyond the wheel
Wind triangle, density altitude and descent
The calculations pilots reach for most, with the same big keypad and huge results. A Unit Converter is included too.
Wind Triangle
Course, true airspeed and wind in. Heading, ground speed and wind correction out.
Density Altitude + TAS
Elevation, altimeter setting, OAT and CAS in. Pressure altitude, density altitude and true airspeed out.
Descent
Altitude to lose, angle and ground speed in. Start distance and descent rate out.
Free and Pro
Three tools are free. One purchase unlocks the rest.
| Tool | Plan |
|---|---|
| Time, Speed, Distance | Free |
| Fuel | Free |
| Crosswind | Free |
| Wind Triangle | Pro |
| Density Altitude + TAS | Pro |
| Weight & Balance with saved aircraft profiles | Pro |
| Descent | Pro |
| Unit Converter | Pro |
Pro is one purchase, not a subscription. Backup and restore of aircraft profiles as a JSON file is always free.
Private by design
No account, no ads, no tracking, no data collected and no third-party SDKs. Your aircraft profiles stay on your iPhone.
Units follow your region
kt or km/h, nm or km, ft or m, lb or kg, US gal, L or imp gal, hPa or inHg. Change them any time in Settings.
Safety note
Not for flight operations. Verify with the AFM/POH.Crab Angle is a planning aid. The N172SP profile is a sample, so replace it with the values from your own AFM/POH.
Questions?
Keypad, crosswind, aircraft profiles, backup and restoring Pro are covered in the FAQ.