# C-130 Duty Day Calc

> C-130 duty day and time calculator for military aircrews. (iPhone/iPad app by John Robbins.)

- Source: https://appshunter.io/ios/app/c-130-duty-day-calc/id994789492 (this page in markdown: same URL + `.md`)
- Developer: [John Robbins](https://appshunter.io/developer/831427516)
- Category: Utilities, Travel
- Price: $0.99
- Rating: 4.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 1 MB
- Languages: American English
- Released: 2015-06-23
- Data updated: 2026-08-21
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/c-130-duty-day-calc/id994789492/reviews.md

## What is C?

A C-130 Duty Day Calculator for crews hauling Uncle Sam's stuff around the world. 

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. 

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 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 zone support
- Customizable timeline feature
- Time calculator for start, duration, end
- 781 decimal duration calculation

## Chart rankings

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

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/c-130-duty-day-calc/id994789492/reviews.md

### 2/5 — Needs proofing

*2015-10-23*

You're welcome Herk drivers... I'll eat my $2 for you.  The tac day and training day should both be show+12, but for tac day it's doing show+14 in the actual calculation. Also, should add an option to use cold wx soe, where the time value can be specified in user options.

## Frequently asked questions about C

### What is C-130 Duty Day Calc used for?

C-130 Duty Day Calc is used by C-130 aircrews to quickly calculate duty day restrictions according to Vol-3 regulations in both Zulu and local time zones. It also includes a time calculator for various scheduling needs.

### How does C-130 Duty Day Calc handle time zones?

The app allows you to calculate duty day restrictions in both Zulu (UTC) and local time zones, ensuring accurate compliance regardless of your location.

### Can I customize C-130 Duty Day Calc?

Yes, a new feature allows you to add your own personal or squadron timeline to the app. This timeline can be linked to other calculator pages or used as a standalone planning tool.

### Does C-130 Duty Day Calc support 781 decimal duration?

Yes, the included time calculator specifically supports calculating durations in the 781 decimal format, which is relevant for certain military aviation contexts.

### What devices is C-130 Duty Day Calc available on?

C-130 Duty Day Calc is available for iPhone, iPad, and iPod devices, as indicated by its supported devices list.

### How often is C-130 Duty Day Calc updated?

The latest version of C-130 Duty Day Calc is 2.0, and it was last updated on April 24, 2022. Users can expect updates based on developer John Robbins' commitment to improvements.

### What is the age rating for C-130 Duty Day Calc?

C-130 Duty Day Calc has an age rating of 4+, making it suitable for a wide range of users.

### Does C-130 Duty Day Calc have ads?

No, C-130 Duty Day Calc does not contain advertisements. It is a paid application designed to be ad-free for a better user experience.

## Version history (last 4 releases)

### 2.0 — 2022-04-24

Fixed a number of issues.  Please keep sending your feedback.

### 1.4 — 2019-04-07

Cleaned up a couple glitches and issues with the calculator and interface.  

inderruhe, thanks for pointing out the error.  Message me and I'll send you your $2 and a 6 pack of PBR. My apologies to all for how long it has taken to fix it up. 

Thanks everyone for supporting the project. Fly Safe!

### 1.3 — 2016-03-17

Fixed a few glitches.

### 1.2 — 2015-06-23

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)
- [KC-135 Duty Day Calc](https://appshunter.io/ios/app/kc-135-duty-day-calc/id986551768)
- [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 2026-08-21.*