# Deicing Holdover > Airline pilot tool for calculating de-icing holdover times with regulatory support. (iPhone/iPad app by Wiseleap Solutions.) - Source: https://appshunter.io/ios/app/deicing-holdover/id867627045 (this page in markdown: same URL + `.md`) - Developer: [Wiseleap Solutions](https://appshunter.io/developer/610477802) - Category: Utilities, Travel - Price: Free - Rating: 4.30/5 from 8 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 153 MB - Released: 2014-05-01 - Data updated: 2026-06-10 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/deicing-holdover/id867627045/reviews.md ## What is Deicing Holdover? Deicing Holdover is a winter operations productivity tool designed with airline pilots' needs in mind. It can calculate a de/anti-icing holdover time based on user-generated inputs, with options to enter all values that could impact a holdover time calculation. The app aims to facilitate the determination of HOT by offering a smart, user-friendly and intuitive interface for the entry of all data points that could impact a holdover time. As inputs are completed, corresponding fields update automatically to ensure that HOTs are easily to calculate and accurate. Users can also select the regulatory agency for which they require HOTs; FAA and Transport Canada. Features include: 1- Deicing holdover calculator based on user input for weather and fluid. 2- Digital versions of the HOT guidelines in PDF format. 3- User friendly timer based on the calculated holdover time. 4- Timer will alert the user when the minimum and maximum HOT expire. 5- Built-in timer allows users to easily see their remaining holdover time and be alerted when the time is set to expire. 6- Notes and cautions of the tables used for the holdover time calculation are accessible from the Calculator page. 7- User will be prompted to select prevailing visibility to determine snow fall intensity only when required. 8- Ability to reset user input. 9- Ability to work offline. 10- Flaps up/down data. Deicing Holdover is part of the Deicing Manager software suite, a web-based solution that streamlines the capture, storage, and analysis of all raw operational data needed to manage aircraft deicing operations. Deicing Manager's on-demand analytics portal converts this data into actionable information. Terms of use : http://wiseleap.com/privacy-statement/ ## Key features - Deicing holdover time calculator - Digital HOT guidelines (PDF) - User-friendly timer with alerts - Supports FAA and Transport Canada - Offline functionality - Flaps up/down data input ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/deicing-holdover/id867627045/reviews.md ### 1/5 — Not updated *2025-12-15* They didn’t update the hold over time charts for two years, therefore the app is useless at the moment. It used to be great when it was working. ## Frequently asked questions about Deicing Holdover ### What is Deicing Holdover? Deicing Holdover is a winter operations productivity tool for airline pilots. It calculates de-icing holdover times based on user-generated inputs for weather and fluid types, supporting both FAA and Transport Canada regulations. ### How does Deicing Holdover calculate holdover times? The app uses a user-friendly interface to input all relevant data that impacts holdover time, such as weather conditions and deicing fluid. As inputs are entered, corresponding fields update automatically for accurate and easy calculation. ### Does Deicing Holdover have a timer? Yes, Deicing Holdover includes a built-in timer based on the calculated holdover time. It will alert the user when the minimum and maximum holdover times expire, helping pilots manage their operations effectively. ### Can Deicing Holdover be used offline? Yes, Deicing Holdover has the ability to work offline. This is a crucial feature for pilots who may not always have reliable internet access during flight operations. ### What regulatory agencies does Deicing Holdover support? Deicing Holdover allows users to select the regulatory agency for which they require holdover times. It currently supports calculations for both the FAA (Federal Aviation Administration) and Transport Canada. ### Does Deicing Holdover have ads? Yes, Deicing Holdover contains advertisements. As a free utility app, it is supported by ads to provide its features to users. ### What devices is Deicing Holdover available on? Deicing Holdover is available on iPhone, iPad, and iPod devices. It is designed to be compatible with Apple's mobile ecosystem. ### How often is Deicing Holdover updated? The latest version of Deicing Holdover is 4.1.18, which was last updated on September 3, 2023. This indicates a relatively active development cycle for the application. ## Version history (last 5 releases) ### 4.1.18 — 2023-09-03 - Updated holdover times data for the 2023-2024 season - Bugfixes ### 4.1.16 — 2022-09-17 - Updated holdover times data for the 2022-2023 season - Bugfixes ### 4.1.10 — 2021-11-12 - Updated holdover times data for the 2021-2022 season - Bugfixes ### 4.1.6 — 2020-11-21 - Updated holdover times data for the 2020-2021 season - Bugfixes ### 4.1.5 — 2020-11-18 - Updated holdover times data for the 2020-2021 season - Bugfixes --- *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 2026-06-10.*