# KC-135 Duty Day Calc

> KC-135 duty day and time calculator for flight crews. (iPhone/iPad app by John Robbins.)

- Source: https://appshunter.io/ios/app/kc-135-duty-day-calc/id986551768 (this page in markdown: same URL + `.md`)
- Developer: [John Robbins](https://appshunter.io/developer/831427516)
- Category: Utilities, Travel
- Price: $0.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 1 MB
- Languages: American English
- Released: 2015-06-27
- Data updated: 2026-08-06
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/kc-135-duty-day-calc/id986551768/reviews.md

## What is KC?

A KC-135 Duty Day Calculator for crews passing Uncle Sam's gas around the globe. 

This app will quickly help you calculate all applicable duty day restrictions in both Zulu and Local.  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. 

NEW: 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 the 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.

## Key features

- Duty day restriction calculation
- Zulu and Local time support
- Vol-3 restriction instant calculation
- Custom timeline addition
- Time calculator (start, duration, end)
- 781 decimal duration support

## Chart rankings

- #160 in Top Paid · Utilities (US App Store)


## Frequently asked questions about KC

### What is KC-135 Duty Day Calc used for?

KC-135 Duty Day Calc is designed to help KC-135 flight crews quickly calculate all applicable duty day restrictions in both Zulu and Local time. It simplifies the process of determining Vol-3 restrictions by allowing users to input alert, show, or takeoff times.

### Does KC-135 Duty Day Calc have ads?

No, KC-135 Duty Day Calc does not contain advertisements. It is a paid application that offers an ad-free experience for its users.

### How much does KC-135 Duty Day Calc cost?

KC-135 Duty Day Calc is available for a one-time purchase price of $0.99. This grants users full access to all its features without any recurring fees.

### What devices support KC-135 Duty Day Calc?

KC-135 Duty Day Calc is supported on iPhone, iPad, and iPod devices. It is designed to function across Apple's mobile operating systems.

### How often is KC-135 Duty Day Calc updated?

The latest version of KC-135 Duty Day Calc is 2.1, which was last updated on January 26, 2023. While specific update frequency isn't detailed, the app has received updates since its release in 2015.

### Can I add my own timelines to KC-135 Duty Day Calc?

Yes, KC-135 Duty Day Calc allows you to add your own personal or squadron timelines. This feature can be tied to the calculator pages or used as a standalone tool for planning your duty day.

### What is the age rating for KC-135 Duty Day Calc?

KC-135 Duty Day Calc has an age rating of 4+. This indicates it is suitable for users of all ages, with no specific content restrictions.

### What kind of time calculations does KC-135 Duty Day Calc offer?

In addition to duty day restrictions, KC-135 Duty Day Calc includes a time calculator. This tool allows you to calculate start, duration, or end times when given the other two, and it supports the 781 decimal duration format.

## Version history (last 4 releases)

### 2.1 — 2023-01-26

Corrections to the Augmented Duty Day CDP and FDP (small text was previously incorrect).   Also corrected for the note on AP inop (18hrs vs 16hrs). 
Thanks Kevin!

### 2.0 — 2022-04-29

It was time for an update.

### 1.4 — 2019-04-09

Minor bug fixes. 
Thanks for supporting the project.

### 1.2 — 2015-06-27

No release notes.

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## More apps by John Robbins

- [C-17 Duty Day Calc](https://appshunter.io/ios/app/c-17-duty-day-calc/id831427512)
- [Post Msn Calc](https://appshunter.io/ios/app/post-msn-calc/id967104806)
- [KC-10 Duty Day Calculator](https://appshunter.io/ios/app/kc-10-duty-day-calculator/id986194211)
- [C-130 Duty Day Calc](https://appshunter.io/ios/app/c-130-duty-day-calc/id994789492)
- [C-5 Duty Day Calc](https://appshunter.io/ios/app/c-5-duty-day-calc/id998041462)

All apps by John Robbins: https://appshunter.io/developer/831427516

## Related topics

[duty day](https://appshunter.io/ios/topics/duty-day)

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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 2026-08-06.*