# ATC Calculator > Stage rally timing calculator for arrival times at controls. (iPhone/iPad app by Snowmoose Software.) - Source: https://appshunter.io/ios/app/atc-calculator/id364625222 (this page in markdown: same URL + `.md`) - Developer: [Snowmoose Software](https://appshunter.io/developer/364625228) - Category: Utilities - Price: Free - Rating: 3.00/5 from 1 App Store ratings · 8 written reviews indexed - Age rating: 4+ - Requires: iOS 6.0 · 1 MB - Languages: American English - Released: 2010-03-27 - Data updated: 2026-07-27 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/atc-calculator/id364625222/reviews.md ## What is ATC Calculator? ATC Calculator (ATCCalc) is a utility for use in stage rally competition for calculating the arrival time for the next control. Time can be entered in minutes or hour:minute format. Hour:minute time is based on a 24-hour clock. The time values are displayed in a large format for easier viewing. The buttons are larger and separated to make it easier to select the intended button on rough transits. ## Key features - Stage rally timing utility - Calculate arrival times - Enter time in minutes - Enter time in hour:minute format (24-hour clock) - Large time display - Large, separated buttons for easy use ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/atc-calculator/id364625222/reviews.md ### 5/5 — Fine *2017-07-18, version 2.0* Fine ### 5/5 — 구매목록 삭제 부탁드려요ㅜㅜ *2017-01-17, version 2.0* 용량이 꽉 차서 구매목록 삭제 부탁드려요ㅜㅜ ### 5/5 — Perfect *2011-12-06* Just what I was looking for. A must have app for any rally nav. ### 5/5 — Perfect *2011-10-22, version 1.2* I use this to check my math on transits. It's simple and I love the large buttons. Thank you! ### 3/5 — Works fine, but... *2011-10-01* Add a subtraction function and the versatility of this app would increase significantly. ### 5/5 — simple £ easy *2011-08-07, version 1.1* great!! ### 5/5 — Perfect For Pilots *2011-05-15, version 1.1* Really good for logbook time calculator. Name should be change as "pilot logbook calculator" ### 5/5 — Very nice. *2010-04-18, version 0* Simple, straightforward and does exactly what it's supposed to do. ## Frequently asked questions about ATC Calculator ### What is ATC Calculator used for? ATC Calculator is a utility designed specifically for stage rally competition. It helps users calculate the precise arrival time for the next control point during an event. ### What time formats does ATC Calculator support? ATC Calculator allows you to enter time in two formats: simple minutes or in a 24-hour clock format using hour:minute notation. This provides flexibility for different user preferences. ### Is ATC Calculator easy to use during a rally? Yes, the app features a large, clear display for time values and uses large, well-separated buttons. This design is intended to make it easier to operate accurately even during the bumpy conditions of a stage rally. ### What devices is ATC Calculator compatible with? ATC Calculator is available for iPhone and iPod devices. It is designed to run on these Apple mobile platforms. ### How often is ATC Calculator updated? The latest version of ATC Calculator is 2.0, which was released on January 15, 2016. Users can expect updates based on developer releases, though the last update was in 2016. ### What is the age rating for ATC Calculator? ATC Calculator has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions. ### Does ATC Calculator have ads? No, ATC Calculator does not contain advertisements. The app is ad-free, allowing for an uninterrupted user experience. ### What is the user rating for ATC Calculator? ATC Calculator has a rating of 3.0 stars based on one user review. This suggests a mixed reception from its current user base. ## Version history (last 4 releases) ### 2.0 — 2016-01-15 This app has been updated by Apple to display the Apple Watch app icon. ATC Calc 2.0 has the following changes: - It fixes issues that stopped previous versions of ATC Calc from working with iOS 9. - The buttons and displayed time values are presented somewhat differently in an attempt to make them easier to read in all lighting situations. - It replaces the black-text-on-white-background/white-text-on-black-background toggle with a slider that adjusts the "brightness" of the background, buttons and display. It does this by adjusting how gray they are displayed. - It scales the buttons and displays to match the size of the screen that it is being run on. There is one small problem noted on some devices. On these devices, the brightness slider will sporadically not respond when touched. This is only an issues on a small number of devices and is a small problem compared to this app not working at all on iOS 9. ### 1.2 — 2011-08-19 Background can be toggled between white and black. Fixed odd behavior with Clear Entry after '=' has been pressed. Minor, miscellaneous improvements. ### 1.1 — 2010-05-24 1. ATCCalc now requires that the clear button be pressed twice to actually clear the calculated arrival time value (the top line) after "=" had been pressed. This is to avoid accidentally deleting the calculated arrival time. 2. The size of the "+" and "=" buttons have been changed so that they are the same size. 3. Minor bug fixes. ### 1.0 — 2010-03-27 No release notes. ## Apps similar to ATC Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Back-Time Calculator](https://appshunter.io/ios/app/back-time-calculator/id429892615) | 5.0 (2) | $0.99 | Utilities | | [Fuel Strategy Calculator (ACC)](https://appshunter.io/ios/app/fuel-strategy-calculator-acc/id6451118654) | 4.3 (3) | Free | Utilities | | [SCT Calculator 3](https://appshunter.io/ios/app/sct-calculator-3/id6615060947) | — | $0.99 | Utilities | | [Acceleration Calculator -](https://appshunter.io/ios/app/acceleration-calculator/id6475189073) | 5.0 (3) | Free | Utilities | | [Phase Calc](https://appshunter.io/ios/app/phase-calc/id837266300) | 5.0 (4) | $1.99 | Utilities | | [NavCalc Dynamic](https://appshunter.io/ios/app/navcalc-dynamic/id1638841716) | 5.0 (1) | Free | Utilities | ## More apps by Snowmoose Software - [CentWatch](https://appshunter.io/ios/app/centwatch/id424471807) - [British History Podcast](https://appshunter.io/ios/app/british-history-podcast/id743717892) - [FinishTime](https://appshunter.io/ios/app/finishtime/id1309461701) All apps by Snowmoose Software: https://appshunter.io/developer/364625228 --- *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 2026-07-27.*