# Great Circle Tool > Measures great circle distance and estimates flight time between two global points. (iPhone/iPad app by Learrocket Productions, LLC.) - Source: https://appshunter.io/ios/app/great-circle-tool/id1176844036 (this page in markdown: same URL + `.md`) - Developer: [Learrocket Productions, LLC](https://appshunter.io/developer/1169376314) - Category: Utilities, Navigation - Price: $2.99 - Rating: 2.60/5 from 5 App Store ratings · 6 written reviews indexed - Age rating: 4+ - Requires: iOS 9.3 · 11 MB - Languages: American English - Released: 2016-11-18 - Data updated: 2026-09-03 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/great-circle-tool/id1176844036/reviews.md ## What is Great Circle Tool? This is an app to quickly measure the great circle distance between two points or airports around the globe. It is a great tool for pilots who can add the aircraft speed and get an estimate of the flight time as well. A must have planning tool for all pilots! ## Key features - Great circle distance calculation - Airport to airport distance - Flight time estimation - Aircraft speed input - Pilot planning tool ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/great-circle-tool/id1176844036/reviews.md ### 1/5 — Appears to be unmaintained; broken. *2025-03-20* I bought this tool to see which cities were under a great circle between two points. Unfortunately, even though you request “Cities” in the settings, you get nothing. Furthermore, if you open the “About” page, it displays a blank screen, and when you then go back, the display is trashed. The only way seemingly to recover is to close the app and reopen it. This has all of the earmarks of a neglected, unmaintained app. ### 1/5 — Completely useless *2023-07-22* Can't measure location between two points. Can't even define a point except by text entry. Offers to show city names but there are none. Developer appears dead at the helm. ### 5/5 — Excellent pilot app *2018-08-23* It simply works great and will work at altitude with no internet connection. Very useful. ### 2/5 — Not bad but crashes *2018-02-04* Only works showing miles. Instantly crashes when trying to switch to kilometres..... App is clearly not supported by developer. ### 1/5 — Great circle tool *2017-08-07* Do not purchase this app. It only can map two locations at a time, unlike the pc/mac program that can map multiple sites. The app crashes when you try to change settings. No resource to lodge complaints or request refund. Will challenge cost with CC company. ### 5/5 — Great and super easy tool *2016-11-23* I work as a long haul pilot. Finally I find an easy and good app that does the job of telling me the distance and time between two airports. It's so useful when u can see the globe and what countries you will fly over. Ironically this is the cheapest of the three apps I've tried. ## Frequently asked questions about Great Circle Tool ### What is the Great Circle Tool used for? The Great Circle Tool is used to quickly measure the great circle distance between two points or airports around the globe. It can also estimate flight time when aircraft speed is provided. ### Is the Great Circle Tool free to download? No, the Great Circle Tool is a paid application. It is available for purchase at $2.99. ### What devices support the Great Circle Tool? The Great Circle Tool is supported on iPhone, iPad, and iPod devices. ### How often is the Great Circle Tool updated? The Great Circle Tool was last updated on November 22, 2016, to version 1.0.1. The initial release date was November 18, 2016. ### What is the age rating for the Great Circle Tool? The Great Circle Tool has an age rating of 4+, making it suitable for a wide range of users. ### Does the Great Circle Tool have ads? No, the Great Circle Tool does not contain advertisements. ### What is the user rating for the Great Circle Tool? The Great Circle Tool has a rating of 2.6 stars based on 5 ratings. ### Can the Great Circle Tool be used for non-aviation purposes? While designed for pilots, the core functionality of measuring great circle distance can be useful for anyone needing to calculate the shortest distance between two points on a sphere. ## Version history (last 2 releases) ### 1.0.1 — 2016-11-22 This update from Apple will improve the functionality of this app. No new features are included. Minor bug fix ### 1.0 — 2016-11-18 No release notes. ## Apps similar to Great Circle Tool | App | Rating | Price | Category | | --- | --- | --- | --- | | [Global Pilot App](https://appshunter.io/ios/app/global-pilot-app/id6473727888) | — | Free | Utilities | | [DA42 M&B mobile](https://appshunter.io/ios/app/da42-m-and-b-mobile/id1637107945) | — | $2.99 | Utilities | | [Speed of Sound Calculator](https://appshunter.io/ios/app/speed-of-sound-calculator/id1409336102) | 3.0 (2) | $2.99 | Utilities | | [Airro E6B](https://appshunter.io/ios/app/airro-e6b/id6444861966) | — | $1.99 | Utilities | | [C182 M&B mobile](https://appshunter.io/ios/app/c182-m-and-b-mobile/id1528900060) | — | $1.99 | Utilities | | [Fluid Ounces and Milliliters](https://appshunter.io/ios/app/fluid-ounces-and-milliliters/id6449398555) | — | $0.99 | Utilities | ## More apps by Learrocket Productions, LLC - [787 Flow & Emergency Trainer](https://appshunter.io/ios/app/787-flow-and-emergency-trainer/id1031040636) - [737ng Flow & Emergency Trainer](https://appshunter.io/ios/app/737ng-flow-and-emergency-trainer/id1071451172) - [Global Express Trainer](https://appshunter.io/ios/app/global-express-trainer/id1199481708) - [Global 6000 Flow Trainer](https://appshunter.io/ios/app/global-6000-flow-trainer/id1202567503) - [ATR 72 (42)-600 Flow Trainer](https://appshunter.io/ios/app/atr-72-42-600-flow-trainer/id1274702684) All apps by Learrocket Productions, LLC: https://appshunter.io/developer/1169376314 --- *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 2026-09-03.*