# coolAltitude — IFR Cold Weather Tool, Deicing > Cold weather IFR and deicing support tool for pilots. (iPhone/iPad app by SilkIdea s.r.o..) - Source: https://appshunter.io/ios/app/coolaltitude/id641533221 (this page in markdown: same URL + `.md`) - Developer: [SilkIdea s.r.o.](https://appshunter.io/developer/413936304) - Category: Utilities, Weather - Price: $7.99 with in-app purchases - Rating: 5.00/5 from 7 App Store ratings · 4 written reviews indexed - Age rating: 17+ - Requires: iOS 17.0 · 49 MB - Languages: American English - Released: 2013-05-02 - Data updated: 2026-09-07 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/coolaltitude/id641533221/reviews.md ## What is coolAltitude? coolAltitude is a professional aviation tool and calculator for IFR pilots operating in cold-weather conditions. It assists with temperature corrections during instrument approaches and integrates weather, runway and de-/anti-icing data into a single, clear workflow. Designed to reduce workload and improve situational awareness during flight preparation, coolAltitude focuses on accuracy, clarity and operational usability. Some advanced features require a paid subscription. -------------------------------- What coolAltitude does • Calculates temperature-corrected altitudes for ILS (CAT I), RNAV/GNSS, VOR and NDB approaches • Requires minimal data entry, using consistent color coding for immediate interpretation • Displays corrected altitudes along the entire approach profile at relevant DME distances • Supports flight path angle (FPA) calculations for FPA-enabled aircraft • Provides vertical speed reference tables (corrected and uncorrected) for various ground speeds • Includes QNH to QFE conversion tables with temperature corrections -------------------------------- Integrated weather and runway information • Live METAR interaction with automatic propagation of relevant values, including temperature (requires subscription) • SNOWTAM decoding with braking action information • RCAM (Runway Condition Assessment Matrix) based on ICAO GRF • Support for DME shift, including threshold, touchdown zone and displaced DME references -------------------------------- De-/Anti-icing support (requires subscription) • FAA Holdover Time (HOT) Guidelines for multiple fluid types and manufacturers • Integrated HOT countdown timer to track minimum and maximum recommended holdover times • Reference tables supporting assessment of snowfall intensity • Structured storage and sharing of airport-specific de-/anti-icing procedures -------------------------------- Saved and shared data (requires subscription) • Save and reload approach presets for individual airports and procedures • Share verified, structured operational data with other users • Local override of shared data when required -------------------------------- Built for professional use coolAltitude is built by pilots, for pilots. It is designed to support decision-making during high-workload phases without replacing approved procedures. -------------------------------- Important notice coolAltitude is an advisory tool only. It is not certified for operational use and does not replace approved documentation. Use in flight operations requires approval and operation as part of the operator’s Electronic Flight Bag (EFB) in accordance with applicable regulations. -------------------------------- coolAltitude does not replace your procedures. It helps you apply them correctly, even on the coldest days. -------------------------------- Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Temperature-corrected altitude calculations for various approaches - Integrated weather and runway condition data - De-/anti-icing support with holdover time timers - SNOWTAM decoding and braking action information - Save and share approach presets and operational data ## Pricing and in-app purchases Base price: $7.99. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | De & Anti-Icing Pro | $7.99 | per year | | Save & Retrieve Approach Data | $7.99 | per year | ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/coolaltitude/id641533221/reviews.md ### 5/5 — Theme *2025-01-22* Previous dark thame was better. ### 5/5 — Excellent! *2024-03-25* This is an excellent review; it fully meets the current operational requirements. Congratulations, you did a great job. **Developer response:** Thank you! ### 1/5 — Not working *2018-09-06* App keeps crashing, calculations are wrong and the design is too complicated ! That’s a theft! don’t download it !!!! ### 4/5 — Does what it says *2015-10-04* Would have 5***** if it worked for positive high temps to help with warmer than ISA RNAV approach baro cross checks. ## Frequently asked questions about coolAltitude ### What is coolAltitude? coolAltitude is a professional support tool designed for IFR pilots operating in cold-weather conditions. It helps with temperature corrections for instrument approaches and integrates various flight data for improved situational awareness. ### Does coolAltitude replace approved procedures? No, coolAltitude is an advisory tool only and does not replace approved documentation or procedures. It is designed to support decision-making and help pilots apply procedures correctly. ### What features require a subscription in coolAltitude? Advanced features such as live METAR interaction, SNOWTAM decoding, RCAM, FAA Holdover Time Guidelines, integrated HOT countdown timers, and the ability to save and share data require a paid subscription. ### What are the subscription options for coolAltitude? coolAltitude offers subscription plans for 'Save & Retrieve Approach Data' and 'De & Anti-Icing Pro', both priced at $7.99 per year. ### Is coolAltitude certified for operational use? No, coolAltitude is not certified for operational use. Its use in flight operations requires approval and operation as part of an Electronic Flight Bag (EFB) in accordance with applicable regulations. ### What devices does coolAltitude support? coolAltitude is supported on iPhone and iPad devices. ### How often is coolAltitude updated? The latest version of coolAltitude is 4.4, and it was last updated on January 20, 2026. This indicates a recent update schedule. ### What is the age rating for coolAltitude? coolAltitude has an age rating of 17+, suggesting it is intended for mature users due to its professional and technical nature. ## Version history (last 5 releases) ### 4.6 — 2026-09-01 • Various interface improvements and usability refinements ### 4.5 — 2026-06-15 • Improved offline operation for more reliable use on the go • Better connectivity monitoring and smarter synchronization when the connection returns • Various interface improvements and usability refinements ### 4.4 — 2026-01-20 Fixed an issue that, in some cases, prevented approaches from being saved to the database. Version 4 expands coolAltitude from a temperature correction calculator into a comprehensive cold-weather operations support tool for IFR pilots. New and improved features include: • Saved and reloadable approach presets for individual airports and procedures • Integrated METAR interaction with automatic propagation of relevant values • Full de-/anti-icing support based on FAA Holdover Time (HOT) Guidelines • Built-in HOT countdown timer to support situational awareness during ground operations • Structured storage and sharing of verified operational data • Improved workflow clarity and reduced data entry requirements This release focuses on accuracy, clarity, and usability during high-workload flight preparation. ### 4.3 — 2026-01-18 This update includes an updated airport database and minor UI/UX refinements, with improved terminology for better operational clarity. Version 4 expands coolAltitude from a temperature correction calculator into a comprehensive cold-weather operations support tool for IFR pilots. New and improved features include: • Saved and reloadable approach presets for individual airports and procedures • Integrated METAR interaction with automatic propagation of relevant values • Full de-/anti-icing support based on FAA Holdover Time (HOT) Guidelines • Built-in HOT countdown timer to support situational awareness during ground operations • Structured storage and sharing of verified operational data • Improved workflow clarity and reduced data entry requirements This release focuses on accuracy, clarity, and usability during high-workload flight preparation. ### 4.2 — 2026-01-09 This update includes a fix for sunrise and sunset calculations, along with minor user interface improvements. Version 4 expands coolAltitude from a temperature correction calculator into a comprehensive cold-weather operations support tool for IFR pilots. New and improved features include: • Saved and reloadable approach presets for individual airports and procedures • Integrated METAR interaction with automatic propagation of relevant values • Full de-/anti-icing support based on FAA Holdover Time (HOT) Guidelines • Built-in HOT countdown timer to support situational awareness during ground operations • Structured storage and sharing of verified operational data • Improved workflow clarity and reduced data entry requirements This release focuses on accuracy, clarity, and usability during high-workload flight preparation. ## Apps similar to coolAltitude | App | Rating | Price | Category | | --- | --- | --- | --- | | [Volo: Airline Pilot Companion](https://appshunter.io/ios/app/volo-airline-pilot-companion/id6759592092) | — | Free | Utilities | | [Cold WXR Altitude Correction](https://appshunter.io/ios/app/cold-wxr-altitude-correction/id949285952) | — | $4.99 | Utilities | | [Logipad XPL](https://appshunter.io/ios/app/logipad-xpl/id6648792065) | — | Free | Utilities | | [GRF Snowtam](https://appshunter.io/ios/app/grf-snowtam/id1514590590) | 1.0 (1) | $1.99 | Utilities | | [SubStandard](https://appshunter.io/ios/app/substandard/id1513656520) | 5.0 (2) | Free | Utilities | | [Flight Bag - Tools for pilots](https://appshunter.io/ios/app/flight-bag-tools-for-pilots/id6467499953) | 5.0 (2) | Free | Utilities | ## More apps by SilkIdea s.r.o. - [handyREADER: Audiobook & eBook](https://appshunter.io/ios/app/handyreader-audiobook-and-ebook/id1558525064) - [PROtune: Guitar Tuner & Chords](https://appshunter.io/ios/app/protune-guitar-tuner-and-chords/id6742357391) All apps by SilkIdea s.r.o.: https://appshunter.io/developer/413936304 ## Related topics [cumulus approach expiry](https://appshunter.io/ios/topics/cumulus-approach-expiry) · [32 approach](https://appshunter.io/ios/topics/32-approach) · [cold weather ops](https://appshunter.io/ios/topics/cold-weather-ops) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*