GroundRollCalc vs RunwayWX

Key Features Ground Roll Estimation Calculates expected takeoff ground roll based on: - Aircraft performance data - Weight and loading - Wind conditions - Density altitude - Runway slope and surface - Runway Visualization Graphical runway display with: - Estimated ground roll marker - Safety margin indicators - Remaining runway awareness Live GPS Mode (Optional) - Track actual takeoff roll in real time - Compare real-world performance to predicted values - Detect deviations from expected performance Aircraft & Airport Management - Store multiple aircraft profiles - Manage airport and runway data - Customize inputs for accurate calculations Built for Real-World Flying - Designed for clarity and speed in the cockpit - Clean interface optimized for iPad use - Focused on practical, decision-support information Important: GroundRollCalc is a supplemental performance tool and is not a substitute for approved aircraft performance data, POH/AFM guidance, or pilot judgment. Always verify performance calculations and operate in accordance with safe aviation practices. Data Sources Airport and aeronautical data may include publicly available datasets such as FAA and openAIP sources. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

RunwayWX: Professional Aviation Weather for Pilots Built by pilots, for pilots. RunwayWX delivers critical weather data in a format designed for professional flight operations. KEY FEATURES: - Runway Wind Analysis Calculate headwind, tailwind, and crosswind components for every runway at 25,000+ airports worldwide. Color-coded displays show favorable/unfavorable conditions at a glance. - Real-Time METAR & D-ATIS Live weather data with automatic D-ATIS parsing to identify active runways. Flight category indicators (VFR/MVFR/IFR/LIFR) provide instant weather assessment. - Satellite Runway Diagrams Interactive satellite view with wind-aligned runway overlays. Zoom, pan, and analyze runway positioning with real geographic context. - Performance Calculations Pressure altitude, density altitude, and freezing level calculations with color-coded severity warnings for high-density altitude conditions. - Astronomical Data Sunrise, sunset, civil twilight, moon phase, and moonrise/moonset times for flight planning and operational requirements. - Airport Intelligence Complete airport identity with country flags, elevation, timezone data, and real-time local/UTC clocks for 25,000+ airports worldwide. - Professional Design Clean, pilot-focused interface designed for quick weather assessment. No ads, no distractions - just the data you need. DATA SOURCES: RunwayWX uses official aviation weather sources including NOAA and CheckWX API, combined with comprehensive runway data from OurAirports. Internet connection required for weather updates. Built with feedback from active airline pilots, RunwayWX brings professional-grade weather analysis to your iPhone.