Holdover Calculator vs SkyPath Pro

Holdover Calculator is a pre-departure decision tool for pilots facing winter operations. It returns the applicable anti-icing holdover or allowance time from FAA or Transport Canada published guidance, based on the actual weather, the de/anti-icing fluid applied, and your aircraft configuration. DESIGNED FOR iOS 26 Built for iOS 26 and its Liquid Glass interface. The pilot answers a sequence of focused questions; the app shows the matching table cell, the published range, and a continuously interpolated estimate within that range. KEY FEATURES • Holdover and allowance times from the current FAA Holdover Time Guidelines and Transport Canada HOT Guidelines. • Live weather autofill via the NOAA Aviation Weather Center — closest METAR or any ICAO you search. • Manual entry always available when stations are out of range or you want to model conditions ahead. • All four fluid types (Type I through Type IV) with both generic-table and specific-brand selections. • Active Frost allowance and Ice Pellet allowance with a 90-minute takeoff-window tracker. • Chart Notes surfaced inline, with active conditions (cold-soaked wing, OAT thresholds, etc.) flagged so you see only the notes that matter right now. • App Estimated time — a continuous interpolation across OAT and precipitation intensity, shown alongside the FAA Recommended low end of every published range. • Countdown timer with Live Activity on the Lock Screen. Minutes and seconds below an hour; hours and minutes above. The wall-clock "Ends at" reference is always shown to the second. • Apple Watch companion for the crew member running the timer. • Cockpit Sync — share one running timer across the flight deck. Link two to four pilots' devices over a direct local Wi-Fi/Bluetooth connection; the captain approves every change, and the link re-establishes itself if a device drops out of range. No account, no internet, no server. • Readable on the ramp. Tap any advisory note — or any setting's description — to enlarge it in a comfortable card sized for reading-distance glasses. • Support & Feedback in one tap. Reach the developer from the menu — write a note and attach a screenshot; your report includes a summary of what you changed this session so issues get resolved faster. No account required. • FAA or Transport Canada as the global default, with per-calculation overrides. • Local or Zulu time display; 12- or 24-hour clock. PRE-DEPARTURE DECISION ONLY This app is an advisor. The pilot in command remains solely responsible for verifying that the selected time is appropriate for the actual conditions, fluid, and aircraft at the moment of departure. Always cross-reference the current published holdover tables. DATA SOURCES • FAA Holdover Time Guidelines (current revision) • Transport Canada Holdover Time Guidelines (current revision) • NOAA Aviation Weather Center (aviationweather.gov) for live METAR observations SUBSCRIPTION Holdover Calculator is an auto-renewable annual subscription, with a free trial for new subscribers. Pricing is shown in the app before you subscribe. • Payment is charged to your Apple ID at confirmation of purchase. • The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. • Your account is charged for renewal within 24 hours before the period ends. • Manage or cancel anytime in your Apple ID account settings. • Any unused portion of a free trial is forfeited when you purchase a subscription. PRIVACY Location is requested only to identify the nearest weather station; your coordinates are sent solely to NOAA to run that query and are never stored or shared with us. No ads, no analytics, no tracking. Privacy Policy: https://kilolimallc.github.io/legal/holdover-calculator/privacy.html Terms of Use (EULA): https://kilolimallc.github.io/legal/holdover-calculator/terms.html Disclaimer: https://kilolimallc.github.io/legal/holdover-calculator/disclaimer.html

SkyPath Pro Turbulence Intel for Pilots The ride-quality layer 128,000+ users already fly with. Live reports, ADS-B turbulence, and 12-hour AI Nowcasts, all in one view. 30-day free trial. Description SkyPath is an AI-powered turbulence intelligence platform, built by pilots for pilots and trusted by leading airlines and business aviation operators worldwide. It unifies five turbulence data sources into a single live ride-quality view: SkyPath Observations, SkyPath ADS-B Turbulence, EDR, Turbulence PIREPs, and SkyPath Nowcast. As you fly, your iPad's motion data feeds the network. In return, you get advance alerts on turbulence ahead of your route and a live picture of conditions across surrounding airspace. Software-only. No hardware, no aircraft grounding, no integration required. SkyPath turns turbulence from an unavoidable hazard into a manageable, predictable risk. THE IMPACT Customers see up to a 50% reduction in turbulence-related injuries (based on 5 years of operational data). Trusted by 128,000+ pilots worldwide, with 40,000 active every day. 9 billion turbulence reports collected and 32 million in-flight notifications delivered anually. Members: NBAA, ACSF, RTCA, APEX. REAL-TIME TURBULENCE INTELLIGENCE Turbulence from five sources, processed through AI modeling, normalized per aircraft type, and refreshed every minute: SkyPath Observations, SkyPath ADS-B derived Turbulence, EDR, Turbulence PIREPs, and SkyPath Nowcast. See exactly what aircraft ahead of you are encountering, the moment they encounter it. A hexagon flashes on your map with the time remaining until the encounter, alongside pop-up and voice alerts, even when the app is in the background. ONELAYER: ALL YOUR DATA, ONE SCREEN SkyPath OneLayer is a smart, consolidated ride-quality layer that combines all turbulence data sources into a single intuitive display. A machine-learning model prioritizes the most current data source for each location, filtering noise and standardizing severity across aircraft types. The full picture, one view. AI-POWERED NOWCAST SkyPath Nowcast projects turbulence, including Clear Air Turbulence, up to 12 hours ahead with 90% accuracy. Built on a machine-learning model that blends complex atmospheric conditions with SkyPath's accumulated observation data. Know what your route looks like before you're committed to it. GPS INTERFERENCE LAYER Live jamming and spoofing zones displayed with severity indicators directly on your map. CONTRAILS LAYER SkyPath's Contrails Layer, powered by Google AI, displays real-time contrail forecasts alongside turbulence data in a single interface. Make climate-conscious routing decisions without compromising safety. OFFICIAL PIREPS TO NWS File a full FAA-recognized PIREP directly from SkyPath to the NWS Aviation Weather Center. The fastest and most intuitive official PIREP submission. A SOFTWARE-ONLY SOLUTION No hardware installation. No aircraft grounding. No integration required. SkyPath deploys across your fleet without interrupting a single flight.