Holdover Calculator

Holdover Calculator

Pre-departure anti-ice advisor

1 ratings
6 reviews
Free
In-App Purchases

Details

Released
October 3, 2014
Updated
October 26, 2026

Features

Holdover Calculator screenshot #1 for iPhone
Holdover Calculator screenshot #2 for iPhone
Holdover Calculator screenshot #3 for iPhone
Holdover Calculator screenshot #4 for iPhone
Holdover Calculator screenshot #5 for iPhone
Holdover Calculator screenshot #6 for iPhone
iphone
iphoneDuo
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About

This tool simplifies the calculation of aircraft de-icing fluid holdover times. It offers manual input or automatic weather data retrieval for quick and accurate results. The app provides alerts for expired times and includes a pre-takeoff check timer.

✓Accurate holdover time verification
✓User-friendly input display
✓Automatic METAR weather retrieval
✓Location-based METAR search
✓Active holdover time countdown
✓Audible and visible expiration alerts
✓Pre-takeoff contamination check timer
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What's New in Holdover Calculator

2.4

October 26, 2026

Corrected tables, without waiting for an app update. • If a correction to the published FAA or Transport Canada holdover tables is issued, Holdover Calculator can now pick it up on its own the next time you open it with a connection. There is nothing you need to do, and nothing to download by hand. The app still carries a complete set of tables and always keeps them, so it works with no signal at all. • See what you are using. A new Holdover Tables section in Settings shows which tables the app is calculating with — the season, the issue date, and whether they came with the app or were picked up since. Check for a correction yourself anytime with Check Now. • A correction takes effect the next time you open the app, so no number can change part-way through a calculation you are relying on. When one is waiting and you would rather have it now, you can switch to it straight away. • Help now covers the Holdover Tables settings, and — on iPad and the open Duo — keeping the result and countdown in view beside your questions. Also fixed: a Freezing Drizzle confirmation that could ask twice, the questions scrolling out of view when the result pane is opened or closed beside them, and a Support report that could be lost if the sheet was swiped away. Same tables as before: FAA and Transport Canada, 2026-2027 season, issued August 11, 2026. Same fluids, same results. Fly safe.

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Subscriptions & In-App Purchases

1 Year Subscription

Required to make holdover calculations

$9.991 Year
7 Days trial
How to cancel Holdover Calculator subscription ⁉️

User reviews

Pricing policy

You should say someplace WHAT the price of the annual subscription is!
It may be a great app, but I’ve spent too much money on useless aviation apps to risk spending money on this. A one week trial, and or put the cost up front, would make me a lot more willing to try.

Works ok

My main complaint is that the only option is to have an automatic renewal. I have been inconvenienced several times trying to get refunds for things I no longer want. Apple should require the option of turning down automatic renewals!!!

Professional pilot

Awesome application, makes computing holdover times a breeze.

Awesome app

Makes checking holdover time a breeze!

Great App

These guys got it together. Very self explanatory. Easy to use.

Developer apps

FAQ

What is the short name for Holdover Calculator?

The short name for Holdover Calculator is Holdover Calculator.

Does Holdover Calculator have ads?

No, Holdover Calculator does not contain advertisements. It is ad-free.

What is the price of Holdover Calculator?

Holdover Calculator is free to download, but a subscription is required to use its calculation features. The '1 Year Subscription' costs $8.99 and includes a 7-day free trial.

How often is Holdover Calculator updated?

The latest version of Holdover Calculator is 1.9.6, which was last updated on November 2, 2025. Updates are released periodically to improve functionality and reliability.

What devices does Holdover Calculator support?

Holdover Calculator is available for iPhone, iPad, and iPod touch devices.

What is the age rating for Holdover Calculator?

Holdover Calculator has an age rating of 4+, making it suitable for a wide range of users.

How do I manage my Holdover Calculator subscription?

You can manage your subscription and turn off auto-renewal by going to your device's Account Settings after purchase. Subscriptions automatically renew unless turned off at least 24 hours before the current period ends.

Can Holdover Calculator be used without an internet connection?

Computations can be performed without a data connection. However, an internet connection is required for the 'Auto-Populate' feature to retrieve weather conditions from METARs.