A C-17 Duty Day Calculator for crews hauling Uncle Sam's stuff around the Globe.

This app will quickly help you calculate all applicable duty day restrictions in both Zulu and Local time zones. Simply enter the Alert, Show or Takeoff time and all Vol-3 restrictions will be instantly calculated for you. No more complex calculus at the end of your duty day.

BONUS: You can now add your own timeline to the app. Add your personal or squadron timeline to the latest addition. The tab can be tied to other calculator pages or work as a standalone tool for you planning your duty day.

It also includes a time calculator that allows you to calculate start, duration or end time when given the other two. Including the 781 decimal duration.

Hope you find it useful. My email is included if you have suggestions for improvements.

What’s New

Version 4.21

Minor changes to cleanup interface and update the application.
Thanks everyone for supporting the project.
Fly Safe

Ratings and Reviews

4.0 out of 5
6 Ratings

6 Ratings

slickwilly28 ,

Great app! Love it! Must have for C-17 crews

Makes everything super easy for anything flying related! My only suggestion would be a calculator for post mission crew rest. I know it's super easy to calculate, but just thought it would be something to add.

JBERMooseDriver ,

A recommendation

I really like the app, thanks for the work to make our lives easier on the road. One recommendation, "Time Calculator" - "Duration" needs to have a decimal point input capability. All the best!

S2keric ,

Great App !!

Awesome app and it is well worth the money. Much better than others available on the market. I was glad to see the creation of this and patiently waited it's release.


John Robbins
7 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© John Robbins


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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