AOA Mobile App vs E6B Flight Computer + W&B

AOA Mobile App is an essential tool for pilots that work for Cathay Pacific and are members of AOA Group and HKALPA.

An E6B flight computer and a complete Weight & Balance, in one app — the two tools a pilot actually reaches for before every flight, without a subscription. Built from the reviews of every other E6B on the store: the calculations they got wrong, the units they wouldn't accept, and the features that got taken away. Free - Time / Speed / Distance - Fuel required, flow, and endurance - Unit converter - distance, speed, pressure, temperature, fuel weight Pro - one purchase, forever - Weight & Balance - add and rename your own stations, save profiles for every aircraft you fly, CG envelope graph, takeoff and landing (after fuel burn) plotted together, %MAC, lb-in or kg-m - Pressure, density, and true (cold-corrected) altitude - CAS to TAS, EAS, Mach and speed of sound - Wind triangle, unknown wind, crosswind and headwind (with gust), true to magnetic to compass heading, off-course correction - Top of descent, required descent and climb rate, glide distance - Holding entry with wind correction, rate and radius of turn - Performance-table interpolation - Cloud base and freezing level - Export your W&B sheet to PDF What sets it apart - Weight & Balance done in full - not removed in an update, not sold as a separate app - Decimals and negative numbers everywhere - 62.07, 30.02, -13, all accepted, on a keypad built for the app so the system keyboard never gets in the way - Real international units - inHg, hPa, mb, mmHg, kg, lb, litres, US and Imperial gallons, metres, feet, degrees C, degrees F, K - shown right next to every value - Your last inputs carry over between calculators, so pressure altitude flows into density altitude flows into TAS - Tap "How was this calculated?" on any result to see the formula and its source - Works 100% offline - in the run-up area, the ramp, or with no signal - Dark mode for night flying, adjustable text size, screen stays awake One-time purchase The free calculators are fully working - never crippled to push the upgrade. One purchase unlocks everything else. No subscription. No ads. No features taken away later. Calculations use the ICAO standard atmosphere and established aviation formulas, and are verified against published handbook examples. This app is a training and planning aid. Use your POH/AFM and official sources for flight decisions.