# HAM Distance: Grid & Callsign — Amateur Radio QTH Distance > Amateur radio distance calculator with callsign, grid, and coordinate input. (iPhone/iPad app by Mircules.) - Source: https://appshunter.io/ios/app/ham-distance-grid-and-callsign/id627422998 (this page in markdown: same URL + `.md`) - Developer: [Mircules](https://appshunter.io/developer/595659821) - Category: Utilities, Reference - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17.0 · 2 MB - Languages: American English - Released: 2013-04-03 - Data updated: 2026-06-28 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/ham-distance-grid-and-callsign/id627422998/reviews.md ## What is HAM Distance? Calculate the distance between any two amateur radio stations in seconds. Mircules HAM Distance is the essential tool for ham radio operators who want to know exactly how far their signal traveled. Enter callsigns, Maidenhead grid locators, or coordinates and get the great-circle distance instantly. THREE INPUT METHODS • Callsign: Enter any amateur callsign to resolve it to coordinates via QRZ.com or HamQTH.com • Maidenhead Grid: Enter grid locators from 2 to 8 characters • Lat/Lon: Enter decimal coordinates directly SAVE YOUR CALCULATIONS Save distance pairs with custom labels like "Home to repeater" or "Field Day DX." Track your contacts over time and review them anytime. MAP VISUALIZATION Plot your saved distances on an interactive map. Filter by week, month, or year, or view all contacts at once. See markers and distance lines for every pair. STATISTICS See your total contacts, longest and shortest distance, average distance, and a distribution chart showing how your contacts break down by range. ICLOUD SYNC Your saved pairs sync automatically across all your devices via iCloud. No account needed — just sign into iCloud and your data is there. HOME SCREEN WIDGETS Add widgets to your home screen to see your latest distance calculation and stats at a glance. NO ACCOUNT REQUIRED The calculator works immediately. Configure your QRZ.com or HamQTH.com credentials and start calculating. Your data stays on your device and in your private iCloud. BUILT FOR HAM RADIO Designed specifically for amateur radio operators. Supports the Maidenhead Locator System, integrates with QRZ.com and HamQTH.com, and uses the Haversine formula for accurate great-circle distances. Free to use. No ads. Tips welcome. 73 de Mircules ## Key features - Distance calculation via callsign, grid, or coordinates - Save and label distance pairs - Interactive map visualization of contacts - Contact statistics and distribution charts - iCloud sync across devices - Home screen widgets for quick access ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Small Tip | $0.99 | one-time | | Large Tip | $3.99 | one-time | | Medium Tip | $2.99 | one-time | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/ham-distance-grid-and-callsign/id627422998/reviews.md ### 2/5 — No longer works with iOS 13.2 *2019-10-29* Was useful for microwave contest work as a Rover, butt since the iOS update to 13.2 it won't stay open, so is now useless. Author - please fix it, and when you do, please make it more readable for us old hands with failing eyesight! Bigger fonts, improved colors/contrast! **Developer response:** We had an issue with iOS 13 but now it's working again. We will bring out a new version in the near future with a total overhaul of the user interface. We will keep your suggestions in mind! ### 1/5 — Mercilessly distance *2013-05-16* NO RATING! Does not work with QRZ. Cannot recognize QRZ's password. Wasted $.99. W4IJY ## Frequently asked questions about HAM Distance ### What is HAM Distance? HAM Distance is a utility app designed for amateur radio operators. It allows users to calculate the great-circle distance between two radio stations using their callsigns, Maidenhead grid locators, or decimal coordinates. The app also offers features for saving, visualizing, and analyzing contact data. ### How does HAM Distance calculate distances? HAM Distance uses the Haversine formula to accurately calculate the great-circle distance between two points on a sphere. It can resolve callsigns to coordinates by integrating with QRZ.com or HamQTH.com. ### Can I save my distance calculations with HAM Distance? Yes, you can save your distance pairs with custom labels, such as "Home to repeater" or "Field Day DX." These saved contacts can be reviewed anytime and are synced across your devices via iCloud. ### Does HAM Distance have ads? No, HAM Distance is free to use and does not contain advertisements. Tips are welcome from users who wish to support the developer. ### What devices does HAM Distance support? HAM Distance is available for iPhone and iPad. It was last updated on April 9, 2026, indicating ongoing support and development. ### How often is HAM Distance updated? The latest version of HAM Distance is 5.0, released on April 9, 2026. This suggests the app receives regular updates to maintain functionality and compatibility. ### Is HAM Distance suitable for young children? HAM Distance has an age rating of 4+, making it suitable for a wide range of users. The app's functionality is focused on technical calculations relevant to amateur radio. ### Can I use HAM Distance offline? While the core distance calculation functionality can be used offline, features like callsign lookup via QRZ.com or HamQTH.com require an internet connection. iCloud sync also necessitates an internet connection. ## Version history (last 5 releases) ### 5.0 — 2026-04-09 Completely rebuilt from the ground up! NEW IN 5.0 • Native iOS experience — faster, smoother, and designed for iPhone • iCloud sync — your saved pairs sync across devices automatically, no account needed • Apple Maps — interactive map with markers and distance lines for every pair • Home screen widgets — see your latest calculation at a glance • Statistics dashboard — total contacts, longest/shortest distance, average, and distribution chart • Tip jar — support development if you find the app useful IMPROVED • Faster callsign lookups with local caching • Better Maidenhead grid locator support (2-8 characters) • Cleaner calculator interface with persistent input state • Secure credential storage in iOS Keychain This is a major rewrite. If you run into any issues, please reach out at info@mircules.com. 73! ### 3.3 — 2020-04-27 Bugfixing ### 3.2 — 2019-07-07 Bug fixes and performance enhancements ### 3.1 — 2016-06-23 - Bugfixes - Saves where the DX grid is taken from ### 3.0 — 2015-09-18 - 64bit support was added. - Splash screen was changed. ## More apps by Mircules - [Mircules DX Cluster](https://appshunter.io/ios/app/mircules-dx-cluster/id595659818) - [HAM QuickLog](https://appshunter.io/ios/app/ham-quicklog/id939665753) - [Mircules Jungle Match](https://appshunter.io/ios/app/mircules-jungle-match/id955847546) - [Mircules WordSearch](https://appshunter.io/ios/app/mircules-wordsearch/id6748924837) All apps by Mircules: https://appshunter.io/developer/595659821 ## Related topics [maidenhead](https://appshunter.io/ios/topics/maidenhead) --- *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 2026-06-28.*