# MEL Day Calculator — calculates MEL intervals > Calculates category A, B, C, and D intervals with custom options and visual expiration indicators. (iPhone/iPad app by SIMON BARRETT WESTMANCOAT.) - Source: https://appshunter.io/ios/app/mel-day-calculator/id6670487917 (this page in markdown: same URL + `.md`) - Developer: [SIMON BARRETT WESTMANCOAT](https://appshunter.io/developer/1766493422) - Category: Utilities, Reference - Price: $0.99 - Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 17.6 · 14 MB - Languages: American English - Released: 2024-09-05 - Data updated: 2026-08-24 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/mel-day-calculator/id6670487917/reviews.md ## What is MEL Day Calculator? The MEL Day Calculator allows rapid and accurate calculation of category A, B, C and D intervals. It allows custom intervals to be set for category A as well as the standard 3, 10 and 120-day intervals for categories B, C and D. The reference date can be freely altered and there is a UTC clock always displayed. Intervals which have already expired (based on the present UTC date) will display a red cross whilst those yet to expire display a green tick. Please enjoy this app but also always check any information provided with your own independent calculations. ## Key features - Calculates category A, B, C, D intervals - Customizable intervals for category A - Standard intervals for B, C, D - Visual expiration status (red cross/green tick) - Adjustable reference date - Always-on UTC clock ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/mel-day-calculator/id6670487917/reviews.md ### 5/5 — Ok it’s not perfect *2025-01-26* If CAT A we can put days whatever we want this app will be amazing app (due to CAT A ONLY HAS 1 - 18 days we can choose) ### 5/5 — Amazing *2024-12-27* Useful application for air navigation ## Frequently asked questions about MEL Day Calculator ### What is the MEL Day Calculator used for? MEL Day Calculator is used to rapidly and accurately calculate category A, B, C, and D intervals. It allows for custom intervals for category A and standard intervals for the other categories, displaying their expiration status. ### Does MEL Day Calculator have ads? No, MEL Day Calculator is ad-free. It is a paid application, meaning you purchase it once to use it without interruptions from advertisements. ### What devices does MEL Day Calculator support? MEL Day Calculator is available for iPhone and iPad devices. It is designed to function on Apple's mobile operating systems. ### How much does MEL Day Calculator cost? MEL Day Calculator is priced at $0.99. This is a one-time purchase fee to download and use the application. ### What is the age rating for MEL Day Calculator? MEL Day Calculator has an age rating of 4+. This indicates it is suitable for children aged 4 and above, with no mature content. ### How often is MEL Day Calculator updated? The latest version of MEL Day Calculator is 1.2.2, last updated on January 7, 2026. While the last update date is in the future, it suggests ongoing development and support. ### Can I set custom intervals in MEL Day Calculator? Yes, you can set custom intervals for category A within MEL Day Calculator. For categories B, C, and D, it uses the standard 3, 10, and 120-day intervals. ### What is the user sentiment for MEL Day Calculator? User sentiment for MEL Day Calculator appears to be very positive, with an average rating of 5.0 stars from 2 ratings. This suggests users are highly satisfied with its functionality. ## Version history (last 5 releases) ### 1.2.2 — 2026-01-07 New iOS icons. ### 1.2.1 — 2024-11-22 Minor bug fixes. ### 1.2 — 2024-11-21 In version 1.2 you can now copy the dates generated to the clipboard. Also there are controls to allow you to turn your flashlight on from within the app and to access the camera to quickly send a photograph to another app or to save it in your photos. Bug fixes. Improved iPad experience. ### 1.01 — 2024-11-20 New UI with much clearer input fields. The output is now colour coded to indicate when a date is expiring. ### 1.0 — 2024-09-05 No release notes. ## Apps similar to MEL Day Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Timestamp Converter](https://appshunter.io/ios/app/timestamp-converter/id6504434165) | — | Free | Utilities | | [The Date Calculator PRO](https://appshunter.io/ios/app/the-date-calculator-pro/id1045043882) | 4.7 (2,603) | Free | Utilities | | [Date Range Search Filter Tool](https://appshunter.io/ios/app/date-range-search-filter-tool/id1580371821) | 5.0 (1) | Free | Utilities | | [WoW Classic Talent Calculator](https://appshunter.io/ios/app/wow-classic-talent-calculator/id1477744876) | 4.4 (1,131) | Free | Utilities | | [YMoWDHMiS: Time Calculator](https://appshunter.io/ios/app/ymowdhmis-time-calculator/id6450873305) | — | Free | Utilities | | [WTDI - Date Calculator](https://appshunter.io/ios/app/wtdi-date-calculator/id1627207359) | — | $2.49 | Utilities | ## Related topics [mel day calculator](https://appshunter.io/ios/topics/mel-day-calculator) --- *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 2026-08-24.*