GoFly vs Crabwise

Fast, accurate, and built to feel good in your hands. No more spinning a plastic wheel and hoping. Type your numbers, get a precise answer, and tap once to see exactly how it got there. Every mode is dialed in and easy to use, whether you're planning a cross-country or just checking a crosswind before you taxi. Live Wind Triangle - A cockpit-style instrument that redraws heading, track, and wind as you type - View the crab angle, not just the number for it Show the Work - Every result opens up into the formula and the values you plugged in - Expand it when you want to understand it, collapse it when you don't Core E6B Tools - True airspeed and density altitude - Time, speed, distance - Fuel and endurance - Crosswind components - Unit conversions METAR Decoder - Pull any airport's live report from the NOAA Aviation Weather Center - Read it in plain language, line by line Weight & Balance - Load your aircraft and see gross weight and CG on the envelope - Save airplanes as presets so you're not re-entering them The Small Stuff - A keypad with the units right on each field, so knots never get mixed up with mph - Works offline. Every calculation runs on your phone. Only live METARs need a signal. - No accounts, no analytics, no ads, nothing collected. Your numbers stay on your phone. *Subscription or purchase required for certain modes and features* https://goflycalculator.app/privacy/ https://goflycalculator.app/terms/

Crabwise is an offline E6B flight computer built for student and private pilots: the six calculations you learn on paper, with type large enough to read at a glance. WIND & GROUND SPEED Solve the wind triangle both directions: find your heading and ground speed, or work backward from heading, track, and ground speed to find the wind. PRESSURE & DENSITY ALTITUDE See the classroom rule of thumb and the exact ICAO Doc 7488 answer side by side, so you know how much margin you actually have. TRUE AIRSPEED & MACH The quick 2%-per-1000-ft approximation and the exact compressible calculation, together. FUEL / TIME / DISTANCE Solve for any one of the three from the other two. CROSSWIND Headwind and crosswind components for any runway and wind. CONVERSIONS Seven unit families: distance, speed, altitude, temperature, pressure, weight, volume. CRABWISE PRO, ONE-TIME PURCHASE ($9.99) - Aircraft profiles: save cruise speed, fuel burn, usable fuel, empty weight and arm, and limits for every aircraft you fly. - Leg planner: chain legs from true course to compass heading, with running totals for time and fuel. - Weight & balance: plot your loading against your aircraft's envelope, checked live as you type. - History & export: save any result and export it as text or CSV. Free forever: all six calculators, every unit, every language, extra-large type. No ads, ever. No trial timer, no subscription. For training and planning cross-checks. Always verify against your aircraft flight manual and official sources. Not for primary navigation. No account. No ads. No tracking. Works offline. Available in English, Spanish, and Polish.