Vane vs Crabwise

Vane is a modern glass-cockpit E6B — the classic flight computer, reimagined for the way pilots fly today. Fourteen precise instruments in one fast, beautiful app, from preflight planning to the cockpit — and every calculator works offline. Every result is built on real aeronautical formulas and shows its work, so you can trust the number and understand it — ideal for student pilots training for the checkride and for working pilots who want the answer in one tap. — 14 PILOT INSTRUMENTS — • Wind Triangle — heading, ground speed and wind correction angle from wind and course • Crosswind — headwind and crosswind components for any runway • Weight & Balance — live CG and envelope check for every load • Nav Log — multi-leg cross-country planning with 48,000 airports built in • METAR & TAF — aviation weather decoded into plain language • Density & Pressure Altitude — your true performance conditions • True Airspeed & Mach — CAS, TAS and Mach from altitude and temperature • Fuel — burn, endurance, range and reserves • Performance — takeoff, landing, climb and glide distances • Heading — true, magnetic and compass with variation and deviation • Holding — entry, timing and hold planning • Top of Descent — when to start down for a smooth arrival • Altitude & Speed — pressure and density altitude at a glance • Conversions — every aviation unit: knots, nm, feet, °C, inHg, hPa and more — BUILT FOR THE COCKPIT — • Offline calculators — every airport, formula and table lives on your device; only live weather needs a connection • Show your work — open any result into clear, step-by-step math • Cold-temperature altitude corrections for IFR approaches, matching the AIM's ICAO table • Save calculations and reopen them anytime • 48,000 airports, runways and frequencies bundled in • Magnetic variation built in — no internet lookup — THREE COCKPITS — • Day, night and red night-vision themes to protect your eyes on late flights • Metric or imperial — your units, everywhere • A calm, high-contrast instrument panel designed to read at a glance Vane is made for student pilots, private pilots (PPL), commercial and airline pilots, CFIs and anyone flying VFR or IFR. Replace your plastic E6B and a pocket full of apps with one instrument. Fly prepared. Download Vane.

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.