ForeFlight Mobile EFB vs Holdover Calculator

Download for a 30-day free trial of our top subscription plan! Visit our website for more information on available plans and add-ons. ForeFlight is the leading flight app for VFR and IFR pilots everywhere, making flight planning and flying easier, safer, and more enjoyable. FLIGHT PLANNING, BRIEFING, & FILING Plan flights with Touch Planning on the Map or full-featured form-based Flights view. Tap out a route in seconds and quickly see if flights will be affected by weather or TFRs. Helpful Route, Altitude, and Procedure Advisors make planning easy and accurate. Generate a graphical preflight briefing and file your flight plan directly from the app. Print a professional-grade Navlog for inflight reference. WEATHER Interactive weather layers include animated radar, global satellite and winds aloft, global icing, turbulence, and surface analysis, graphical AIR/SIGMETs, flight category, visibility, and more. View decoded METARs, TAFs, and MOS forecasts. Thoughtfully organized Imagery view puts a full range of forecast tools at your fingertips. PLATES, CHARTS, & MAPS Both VFR and IFR operations are covered with all of the essentials required for planning and navigation: data-driven Aeronautical Maps, VFR Sectionals, High/Low Enroute charts, SIDs, STARs, approach and taxi charts, and terrain, satellite, and street map views. GEO-REFERENCED APPROACHES & TAXI CHARTS Plates and taxi charts enable the real time display of your GPS location on the chart. They can also be overlaid on the Maps view along with weather and hazards for the ultimate situational awareness. GLOBAL HAZARD AWARENESS TECHNOLOGY Plan and fly with more confidence in all conditions and terrain. Top-down-view Hazard Advisor map layer, Terrain Profile View, and 3D Synthetic Vision seamlessly integrate into the map display to depict a clear picture of terrain and obstacle hazards anywhere in the world. When paired with an AHRS source, Synthetic Vision provides a backup attitude display. LOGBOOK Logbook makes it easy to log and share flights, track hours, review currency, record certificates and ratings, receive electronic instructor endorsements, and create experience reports. Your data is automatically synced across all your devices and protected in secure cloud storage. ADDITIONAL FEATURES INCLUDE: Built-in documents catalog with FAR/AIM, charts supplements, and more Airport, FBO, and fuel price information for thousands of locations Dynamic data-driven Aeronautical Maps Weight & Balance Glide Advisor Automatic chart and data data updates Chart color inversion for better night flying experience Access to web planner

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 devices over a direct local connection; the captain approves every change. No account, no internet, no server. • On iPad and the open iPhone Duo, dock the holdover time and countdown beside your questions, on either side. • 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