# FDP Calculator — Crew Rest & FDP Calculator > A flight duty and rest period calculator for aviation professionals. (iPhone/iPad app by Machkit LTD.) - Source: https://appshunter.io/ios/app/fdp-calculator/id6738784799 (this page in markdown: same URL + `.md`) - Developer: [Machkit LTD](https://appshunter.io/developer/1180576418) - Category: Utilities - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 16.6 · 6 MB - Languages: English - Released: 2024-12-05 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/fdp-calculator/id6738784799/reviews.md ## What is FDP Calculator? Flight Duty Calculator - Your Reference Tool for Flight Time Limitations Make informed decisions about your duty times and rest periods with our user-friendly calculator designed for aviation professionals. This app helps flight crew members understand their duty limitations and required rest periods. Key Features: Simple duty time calculation for Single, Augmented, and Double crew operations Rest facility class consideration (Class 1, 2, and 3) Time zone difference calculations Sector-based rest adjustments Home base return considerations Next duty possibility calculator Perfect for: Commercial Pilots Cabin Crew Members Flight Operations Officers Crew Planning Teams IMPORTANT NOTICE: This application is for reference purposes only. Each crew member remains responsible for verifying their own flight duty periods and rest requirements according to their company's operations manual and applicable regulations. The calculations provided should not be used as the sole source for determining duty times and rest periods. How to Use: Enter your duty start time Select crew composition Choose rest facility class if applicable Input number of sectors Specify time zone difference Get instant calculations for duty end time, required rest, and next possible duty Keep track of your duty times more efficiently while maintaining compliance with CARC regulations. Download now and simplify your flight duty planning. Note: Always refer to your company's operations manual and current CARC regulations for official guidance. ## Key features - Duty time calculation for single, augmented, and double crews - Rest facility class consideration - Time zone difference calculations - Sector-based rest adjustments - Home base return considerations - Next duty possibility calculator ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/fdp-calculator/id6738784799/reviews.md ### 5/5 — Like it *2024-12-08* Helpful app, logo is outstanding ### 4/5 — Friendly app *2024-12-05* This app has a friendly interface that makes it easy to use. The instant results are convenient, and I love that it works offline ## Frequently asked questions about FDP Calculator ### What is FDP Calculator? FDP Calculator is a reference tool designed for aviation professionals to help them understand and calculate flight duty times and required rest periods based on various operational factors. ### Is FDP Calculator free to use? Yes, FDP Calculator is available for free. There are no costs associated with downloading or using its core functionalities. ### What devices does FDP Calculator support? FDP Calculator is supported on iPhone and iPad devices, making it accessible for a wide range of Apple users in the aviation industry. ### How often is FDP Calculator updated? The app was last updated on December 8, 2024, with version 1.1. This indicates a recent update, suggesting ongoing development and maintenance by the developer. ### What is the age rating for FDP Calculator? FDP Calculator has an age rating of 4+, meaning it is suitable for users of all ages and does not contain content that would be inappropriate for children. ### Does FDP Calculator have ads? No, FDP Calculator does not contain advertisements. Users can utilize the app without any interruptions from ads. ### What kind of calculations can FDP Calculator perform? FDP Calculator can perform simple duty time calculations for different crew compositions, consider rest facility classes, calculate time zone differences, and adjust rest periods based on sectors. ### What is the user sentiment for FDP Calculator? Based on the available data, FDP Calculator has a perfect 5.0-star rating from one review, indicating a highly positive initial user reception. ## Version history (last 2 releases) ### 1.1 — 2024-12-08 Planned Extension Support: Easily calculate the impact of planned duty extensions on your flight duty period and required rest. Round Trip Selection: A dedicated toggle for round trip operations that dynamically adjusts your calculations. Duty Exceeded Warnings: Now displays precise warnings in hours and minutes when your duty exceeds the allowable limits. Improved User Interface: Compact and streamlined duty duration input, optimized for both iPhone and iPad screens. Performance Enhancements: Faster calculations and a smoother user experience. ### 1.0 — 2024-12-05 No release notes. ## More apps by Machkit LTD - [Yallawin](https://appshunter.io/ios/app/yallawin/id6756559444) - [Duty Time - FTL Calculator](https://appshunter.io/ios/app/duty-time-ftl-calculator/id6762084323) All apps by Machkit LTD: https://appshunter.io/developer/1180576418 --- *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 2026-06-10.*