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Holdover Calculator

Holdover Calculator

Pre-departure anti-ice advisor

1 ratings
6 reviews
#177 in top-grossing Weather
🔧 Utilities
☀️ Weather
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 3, 2014
  • September 28, 2026

Features

Developer

Kilo Lima Management, LLC
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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

2.2.1

September 28, 2026

This update fixes one thing, and it matters. • The disclaimer screen. On some devices the "Agree" button could stay greyed out even after you had scrolled down and read every word — leaving no way into the app at all. The button now becomes available as soon as you reach the bottom of the text. If you opened the app and could not get past the disclaimer, this build clears it. Nothing else has changed: the same Winter 2026–2027 FAA and Transport Canada tables, the same fluids, the same results. Our thanks to the pilot who took the time to write in about this. A screen that won't let you in is also a screen you can't report a problem from, so that email is the only reason we found it. If something in the app ever looks wrong, please tell us. 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 ⁉️

Charts

Top Grossing

📉 177-11

Weather

This app dropped -11 positions in Weather chart.

Last updated on October 15, 2026.

User reviews

Most RecentHighest RatedLowest Rated

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.
WonttakeanegativereviewWonttakeanegativereview

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!!!
JerseyreddevilJerseyreddevil

Professional pilot

Awesome application, makes computing holdover times a breeze.
f1fanmanf1fanman

Awesome app

Makes checking holdover time a breeze!
T-NaztT-Nazt

Great App

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

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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.