# DBHam > Amateur radio utility for calculating distance and bearing via Maidenhead grid. (iPhone/iPad app by Thomas Sullivan.) - Source: https://appshunter.io/ios/app/dbham/id558673465 (this page in markdown: same URL + `.md`) - Developer: [Thomas Sullivan](https://appshunter.io/developer/307748713) - Category: Utilities, Education - Price: Free - Rating: 2.70/5 from 3 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 10.3 · 12 MB - Languages: American English - Released: 2012-09-25 - Data updated: 2026-06-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/dbham/id558673465/reviews.md ## What is DBHam? Compute distance and bearing using Maidenhead location. This was originally intended for use by amateur radio operators who participate in microwave communications however it can be used by any ham in order to determine a distance and bearing to another radio amateur. If you want to see maps of the source and target with annotations and overlays as well as be able to touch the map to determine the grid at a particular point, then take a look at our App: DBHamPlus. ## Key features - Calculate distance - Calculate bearing - Maidenhead grid system - Amateur radio focused - Location annotation ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/dbham/id558673465/reviews.md ### 2/5 — Needs work *2020-01-28* Using picker wheels to enter a 6-character grid is clumsy. This app really needs a keyboard feature. Also does not rotate on the screen as my iPad is rotated as any normal app would. ### 5/5 — Highly recommended *2019-08-07* This app is very handy when you want to know the distance and bearing between two points when you have their Maidenhead grid squares. I used the earlier app for years but the neat location setting option and the map are great upgrades. Andrew VK1DA ### 1/5 — Communistic metric *2017-09-13* Not designed to be used in the United States, couldn't find a settings button to switch to miles instead of this communistic metric crap. **Developer response:** The United States contest (ARRL Microwave) that this App is used and was written for, scores contacts in kilometers not miles. I decided that if I allowed the program to display miles then it would be likely that someone would enter miles for their score instead of kilometers. If for example you made a 161 kilometer microwave contact and forgot that you were displaying miles, you would score the contact as 100 points instead of 161. So, that’s why I decided to not have miles conversion in my free App. ### 1/5 — Db ham *2012-10-15* Can't seem to find V in prefix ? **Developer response:** This App is for calculating distance and bearing using grid squares (Maidenhead)...not for looking up international call signs. That's why there no V. Maidenhead two digit prefixes go from AA-RR in the first two digits. ### 5/5 — Supporting a fellow ham! *2012-09-24* Great little app surely more great features to come! ## Frequently asked questions about DBHam ### What is DBHam used for? DBHam is a utility application designed to compute the distance and bearing between two points using the Maidenhead locator system. It is particularly useful for amateur radio operators. ### Is DBHam free to use? Yes, DBHam is available for free. There are no costs associated with downloading or using its core functionalities. ### What devices does DBHam support? DBHam is supported on iPhone and iPod devices. It is not currently available for Android or other platforms. ### How often is DBHam updated? The latest version of DBHam is 1.32, last updated on July 18, 2017. This indicates infrequent updates in recent years. ### What is the age rating for DBHam? DBHam has an age rating of 4+, making it suitable for a wide range of users. ### Does DBHam have ads? No, DBHam does not contain advertisements. Users can utilize the application without encountering any ads. ### What is the user sentiment for DBHam based on ratings? DBHam has a rating of 2.7 stars from 3 ratings. This suggests a mixed to negative user reception based on the limited feedback available. ### Can DBHam show maps? The core DBHam application does not display maps. For map visualization with annotations and the ability to touch for grid points, the companion app DBHamPlus is recommended. ## Version history (last 3 releases) ### 1.32 — 2017-07-18 This app has been updated by Apple to display the Apple Watch app icon. Updated for latest iOS. Resolved issue with using location services. ### 1.02 — 2013-05-11 DBHam now has a slider to control automatic source location. This means that you can use location services to determine your source grid automatically. ### 1.01 — 2012-09-20 No release notes. ## Apps similar to DBHam | App | Rating | Price | Category | | --- | --- | --- | --- | | [TLF Events Tamil](https://appshunter.io/ios/app/tlf-events-tamil/id1481109080) | — | Free | Utilities | | [レコーダー - スピークバディ パーソナルコーチング](https://appshunter.io/ios/app/id1469874020) | — | Free | Utilities | | [EIRP Calculator](https://appshunter.io/ios/app/eirp-calculator/id785448118) | — | Free | Utilities | | [Coordinate map, query location](https://appshunter.io/ios/app/coordinate-map-query-location/id1663122050) | — | Free | Utilities | | [SSI Steel Design](https://appshunter.io/ios/app/ssi-steel-design/id1474838160) | 3.0 (1) | Free | Utilities | | [Magneto Metal](https://appshunter.io/ios/app/magneto-metal/id6478928139) | — | Free | Utilities | ## More apps by Thomas Sullivan - [DBHamPlus](https://appshunter.io/ios/app/dbhamplus/id683196156) - [DBHamPlot](https://appshunter.io/ios/app/dbhamplot/id799430275) All apps by Thomas Sullivan: https://appshunter.io/developer/307748713 ## Related topics [dbham](https://appshunter.io/ios/topics/dbham) --- *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 2026-06-05.*