# HOTCalculator

> Pilot tool for fast calculation of de-icing/anti-icing hold-over times. (iPhone/iPad app by Johan Bergsee.)

- Source: https://appshunter.io/ios/app/hotcalculator/id423099991 (this page in markdown: same URL + `.md`)
- Developer: [Johan Bergsee](https://appshunter.io/developer/423099994)
- Category: Reference, Weather
- Price: Free with in-app purchases (on sale, was $1.99)
- Rating: 4.20/5 from 5 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 6 MB
- Languages: English
- Released: 2011-03-06
- Data updated: 2026-07-09
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/hotcalculator/id423099991/reviews.md

## What is HOTCalculator?

Calculate hold-over time fast and easy with the HOTCalculator!  With this app you can find the holdover-time in a few seconds. No more searching for the right page and table in your paper manuals. Very handy tool for all pilots during winter ops.

The perfect tool to include in your Electronic Flight Bag!

Features:
- Support for Type I, Type II, Type III and Type IV de-icing and anti-icing fluids
- *NEW*: Select FAA or Transport Canada HOT guidelines
- Use °C or °F as appropriate
- *NEW*: Includes adjusted holdover times for anti-icing with flaps extended
- Usable in flight mode, when you need it the most
- Set a timer that gives off an alarm when the holdover-time expires
- Includes Allowance Times for Type IV fluids

Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Calculate hold-over time for de-icing/anti-icing fluids
- Support for Type I, II, III, and IV fluids
- FAA or Transport Canada guidelines
- Support for °C or °F
- Adjusted times for flaps extended
- In-flight mode usability
- Holdover time expiration alarm

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| All fluids, 1 year | $3.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| All fluids winter 2025-2026 | $4.99 | one-time |
| All fluids winter 2024-2025 | $4.99 | one-time |


## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/hotcalculator/id423099991/reviews.md

### 5/5 — Problem fixed. App is back to being great!

*2025-10-01*

All is great again. Thank you!

### 5/5 — Awesome!

*2024-01-27*

It works very well. Have been using the app for many years.

### 5/5 — Very Good

*2023-11-26*

Very useful for calculating Hold Over Times. Highly recommend!

### 5/5 — Very Helpful

*2023-11-26*

If your company doesn’t have an app for Hold Over Times then this app will be very useful. The app is updated every year for the upcoming winter months. I have been using for years and have no complaints.

### 1/5 — Useless

*2012-05-14*

Waste of time and money

### 5/5 — Great app

*2011-12-21*

Ideal if you cant remember the holdover times off the top of your head, easy to use, ideal for pilots, engineers, deicers to use as a guide, exactly same as holdover charts.

## Frequently asked questions about HOTCalculator

### What is HOTCalculator?

HOTCalculator is a utility app designed for pilots to quickly calculate hold-over times for various de-icing and anti-icing fluids. It supports different fluid types, temperature units, and includes adjusted times for specific conditions like flaps extended.

### Does HOTCalculator have ads?

No, HOTCalculator does not contain advertisements. It offers a free version with optional in-app purchases for enhanced features or subscriptions.

### What de-icing fluids does HOTCalculator support?

HOTCalculator supports Type I, Type II, Type III, and Type IV de-icing and anti-icing fluids. It also includes Allowance Times for Type IV fluids.

### Can I use HOTCalculator in flight mode?

Yes, HOTCalculator is designed to be usable in flight mode, ensuring you can access its features when needed most during operations.

### What are the subscription options for HOTCalculator?

HOTCalculator offers a subscription for 'All fluids, 1 year' at $3.99, which includes a 7-day free trial. This subscription likely unlocks all fluid types and guidelines.

### What is the age rating for HOTCalculator?

HOTCalculator has an age rating of 4+, making it suitable for a wide range of users. It was last updated on October 1, 2025.

### How often is HOTCalculator updated?

The app was last updated on October 1, 2025, with version 5.0.1. This indicates a relatively recent update, suggesting ongoing development and maintenance.

### What devices is HOTCalculator compatible with?

HOTCalculator is compatible with iPhone, iPad, and iPod devices. It was originally released on March 6, 2011.

## Version history (last 5 releases)

### 5.0.1 — 2025-10-01

- Bugfix: Timer counting down in background (iOS 26)
- Bugfix: Fetching subscription data before loading the view.

### 5.0 — 2025-09-25

Updated Holdover times for winter 2025-2026.
Entirely rewritten in SwiftUI.

### 4.0 — 2024-10-22

- Holdover times for winter 2024-2025
- Select FAA or Transport Canada HOT guidelines
- Includes adjusted holdover times for anti-icing with flaps extended

### 3.7 — 2023-09-22

Updated for winter 2023-2024.

### 3.6 — 2022-09-27

Holdover Times Updated for Winter 2022-2023.

## Apps similar to HOTCalculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [B767 Limits](https://appshunter.io/ios/app/b767-limits/id6751966001) | — | $0.99 | Reference |
| [Gulfstream Plane Balance](https://appshunter.io/ios/app/gulfstream-plane-balance/id604990571) | 3.3 (3) | Free | Reference |

## More apps by Johan Bergsee

- [Location Finder](https://appshunter.io/ios/app/location-finder/id512188347)
- [Flight Briefing](https://appshunter.io/ios/app/flight-briefing/id931272065)
- [Konfidens](https://appshunter.io/ios/app/konfidens/id6759582052)

All apps by Johan Bergsee: https://appshunter.io/developer/423099994

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*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 2026-07-09.*