# Pilot Duty & Performance Calc — Aviation Calculator > Comprehensive aviation calculator for duty time, performance, and landing calculations. (iPhone/iPad app by Crop Applications, LLC..) - Source: https://appshunter.io/ios/app/pilot-duty-and-performance-calc/id537253628 (this page in markdown: same URL + `.md`) - Developer: [Crop Applications, LLC.](https://appshunter.io/developer/563015362) - Category: Utilities, Productivity - Price: $4.99 - Rating: 3.50/5 from 12 App Store ratings · 15 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 2 MB - Languages: American English - Released: 2012-07-16 - Data updated: 2026-08-29 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/pilot-duty-and-performance-calc/id537253628/reviews.md ## What is Pilot Duty & Performance Calc? Have you been waiting for an all-encompassing Part 135 Application to come along to assist in the laborious calculations associated with the job? Ever wonder how nice it would be to be have an iPad/iPhone App compute your “rolling” block/flight time requirements, in accordance with FAR 135.267, whether you are a single pilot (8/24) operator or dual piloted (10/24) operator? What about an App to assist with computing Departure Gradients, Climb Performance, Enroute Descents, Approach Planning Descent Distance and Timing, Landing Performance summaries including wet, dry and DAAP calculations, Runway Gradients and daily utilized aviation conversions? The wait is over! The Pilot Aviation Duty and Performance Calculator Application offers all these calculations wrapped up in a single application. It also includes a Date Calculator that makes it easy to compute the common Minimum Equipment List (MEL) due dates or even your 30 day VOR Check. You no longer need to fill your iPad/iPhone with countless Apps to get the aviation information you desire, everything you need is included in this one simple to use App. Although this App is geared toward Part 135 operators the various calculations can easily be adapted for use by all Part 91 General Aviation operators as well as Part 121 Commercial Airline pilots. There is something here for every professional pilot. ## Key features - Duty time calculations (8/24, 10/24) - Departure gradients - Climb performance - Approach planning - Landing performance summaries - Date calculator for MEL and VOR checks - Aviation conversions ## Recent user reviews (10 of 15) All indexed reviews: https://appshunter.io/ios/app/pilot-duty-and-performance-calc/id537253628/reviews.md ### 4/5 — Almost perfect *2025-12-23* Two things. First, would love to see the ability delete a leg at the top and everything below move up so I can keep a running log. Currently, when I get to a point I can start deleting earlier legs, I have re-enter the relevant legs to move them up. Second, and I imagine this would be difficult to make happen, be able to define how the app calculates 10th’s of an hour. Seem’s I’ve come across rounding error discrepancies between this and my company’s scheduling software. Other than that, this app has already saved me from going over. Great overall. ### 4/5 — Great app for 135 pilots *2022-10-30* This is a great app for pilots to keep you legal and also has useful conversion calculation abilities. The only thing they need to improve to make it a five star app is allow Zulu time entry on the duty time page so that it takes out even more confusion when entering times because you have to convert them into local time. ### 4/5 — Charter Ops *2021-05-19* VERY helpful when quoting charter trips! No scheduling software does a good job at 10/24, so this app has already come in handy twice in the last 2 weeks. It’s not perfect- with there was a UTC option and buttons aren’t aligned perfectly, but it works! ### 5/5 — Love love love this app!! *2020-02-26* I could hug whoever made this! The 10/24 is fabulous but the conversion section as well the climb/descend section have made my job SO much easier!! Thank you!! ### 2/5 — Good app, but *2017-05-07* This is a good app, but it is annoying that the times are not saved when the app is exited. So essentially any info put into it is deleted anytime it is closed. This makes it very difficult to store hours in it. After spending $4.99, I expect something that works better. **Developer response:** This issue was resolved in Version 2.4. Thank you for bringing it to our attention. ### 3/5 — Good but not what I needed *2016-02-13* My ground class worked this out on our current flight schedule and everything matched up however this app is under the accordance of FAR 135.267 (charter) ops. I'm hoping that there will be an update to switch between that and FAR 135.265 (commuter) ops. To be completely honest I don't know how and where the duty and rest requirements differentiate but overall the app is wonderful and has many applications ### 5/5 — Great *2015-12-30* Lots of great tools for a 135/91k crew member and dispatcher. A must have. ### 4/5 — Very helpful! *2014-05-16* Thank you for creating! Is there any way you could increase the number of legs you can put in before you have to reset. 20+? I would like to put in a months worth of schedule at a time to make sure it works for me. Thanks again. SMH ### 4/5 — Ist nice, but.... *2013-06-11* This is a very intuitive app, very helpful but i would like an aption where you can plan a decent with more tha a 3 degree angle. Im pretty shure that you guys can make a more customizable app! Hope to see an uptdate soon! ### 5/5 — Must have for 135 pilots *2013-05-23* I end up using this app more frequently than I ever anticipated. The 10/24 calculator has saved my bacon more than once! Pilots are inherently cheap, but this is insurance that's well worth the price. Written by a 135 pilot for 135 pilots. ## Frequently asked questions about Pilot Duty & Performance Calc ### What is Pilot Duty & Performance Calc used for? Pilot Duty & Performance Calc is designed to simplify complex aviation calculations for pilots. It handles duty time, departure gradients, climb performance, approach planning, landing performance, and date calculations for tasks like MEL due dates or VOR checks. ### Who can benefit from Pilot Duty & Performance Calc? While geared towards Part 135 operators, the calculations are adaptable for Part 91 General Aviation and Part 121 Commercial Airline pilots. It aims to provide value for all professional pilots. ### How much does Pilot Duty & Performance Calc cost? Pilot Duty & Performance Calc is a paid application, available for $4.99. This one-time purchase grants access to all its features. ### Does Pilot Duty & Performance Calc have ads? No, Pilot Duty & Performance Calc does not contain advertisements. It is a paid application designed to be ad-free for a better user experience. ### What devices is Pilot Duty & Performance Calc compatible with? Pilot Duty & Performance Calc is compatible with iPhone, iPad, and iPod devices. It is designed for iOS users. ### How often is Pilot Duty & Performance Calc updated? The latest version, 2.6, was released on October 8, 2024. The app is actively maintained, with updates typically released to improve functionality and address any issues. ### What is the user rating for Pilot Duty & Performance Calc? Pilot Duty & Performance Calc has a rating of 3.5 stars based on 11 user ratings. This indicates a generally positive but mixed reception from its user base. ### Is Pilot Duty & Performance Calc suitable for younger users? Pilot Duty & Performance Calc has an age rating of 4+, making it suitable for a wide range of users. However, its complex aviation calculations are primarily intended for professional pilots. ## Version history (last 5 releases) ### 2.6 — 2024-10-08 24 hour format on all devices. Time format changed to support Zulu time. ### 2.5.1 — 2021-06-01 +/- button added to date calculation. ### 2.5 — 2021-04-29 Dark mode support. ### 2.4 — 2018-01-21 This app has been updated by Apple to display the Apple Watch app icon. - iOS 11 support. - iPhone X support. ### 2.3 — 2015-06-12 Date picker set to display 24 hour clock on iPhone and iPad ## Apps similar to Pilot Duty & Performance Calc | App | Rating | Price | Category | | --- | --- | --- | --- | | [Flight Duty Calculator (FAA)](https://appshunter.io/ios/app/flight-duty-calculator-faa/id830723551) | 1.0 (1) | $2.99 | Utilities | | [FBOlink - Messaging](https://appshunter.io/ios/app/fbolink-messaging/id1329221786) | 3.6 (12) | Free | Utilities | | [Crew Room: Town Hall](https://appshunter.io/ios/app/crew-room-town-hall/id1643950419) | 3.7 (6) | Free | Utilities | | [K4 Tools](https://appshunter.io/ios/app/k4-tools/id6758374210) | 5.0 (1) | Free | Utilities | | [Pilot10/24Duty](https://appshunter.io/ios/app/pilot1024duty/id6754176983) | — | $3.99 | Utilities | | [ACN/PCN Calculator](https://appshunter.io/ios/app/acnpcn-calculator/id1049063069) | 4.5 (135) | Free | Utilities | ## More apps by Crop Applications, LLC. - [Cloud Topper](https://appshunter.io/ios/app/cloud-topper/id563015359) - [Timber Tree Height Estimator](https://appshunter.io/ios/app/timber-tree-height-estimator/id921705279) All apps by Crop Applications, LLC.: https://appshunter.io/developer/563015362 --- *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 2026-08-29.*