# HamBand — HF Propagation for Ham Radio > Amateur radio HF band conditions and solar weather data for propagation prediction. (iPhone/iPad app by TAYLOR JOHN TRANSUE.) - Source: https://appshunter.io/ios/app/hamband/id6772585467 (this page in markdown: same URL + `.md`) - Developer: [TAYLOR JOHN TRANSUE](https://appshunter.io/developer/6772585469) - Category: Utilities - Price: Free - Rating: 5.00/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 26.0 · 2 MB - Languages: American English - Released: 2026-05-28 - Data updated: 2026-07-27 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/hamband/id6772585467/reviews.md ## What is HamBand? HamBand - HF Band Conditions HamBand gives amateur radio operators instant, real-time HF band condition assessments based on live solar weather data from NOAA's Space Weather Prediction Center. Whether you're heading out for a Parks on the Air (POTA) activation, setting up for Field Day, or just checking conditions from the shack, HamBand tells you what the bands are doing right now - no account, no setup, no clutter. Band Conditions Get instant Good, Fair, or Poor ratings for the five primary HF bands - 10m, 15m, 20m, 40m, and 80m - based on real solar physics. Ratings are calculated from the Solar Flux Index (SFI) and K-Index using band-specific propagation thresholds. Greyline Visualizer Watch the day/night terminator move across a live world map in real time. When your QTH sits on the greyline, low-band DX on 160m, 80m, and 40m lights up — so instead of guessing when that sweet spot rolls through, you can see it coming. 7-Day Trend Charts Track how solar conditions have evolved over the past week with interactive K-Index and SFI trend charts. Spot incoming geomagnetic storms before they kill your signal. Live Solar Data See the current Solar Flux Index, K-Index, and last updated time at a glance. Tap either metric for a plain-English explanation of what it means for your operating. Apple Watch Companion Check band conditions right from your wrist. The Apple Watch app and complication keep key solar indices and band ratings accessible without touching your phone - perfect when both hands are on the antenna. Pull to Refresh Always fetching fresh data directly from NOAA. No subscriptions, no accounts, no ads. HamBand is built by KD3CLW, a licensed amateur radio operator in western Pennsylvania. 73 de KD3CLW ## Key features - Real-time HF band condition ratings - Greyline visualizer for propagation - 7-day trend charts for solar data - Live Solar Flux Index and K-Index - Apple Watch companion app and complication - No subscriptions, accounts, or ads ## Frequently asked questions about HamBand ### What are the primary HF bands HamBand provides ratings for? HamBand provides ratings for the five primary HF bands: 10m, 15m, 20m, 40m, and 80m. These ratings are calculated based on the Solar Flux Index (SFI) and K-Index using band-specific propagation thresholds. ### How does HamBand's Greyline Visualizer work? The Greyline Visualizer shows the real-time movement of the day/night terminator across a world map. This helps users identify when low-band DX on 160m, 80m, and 40m is likely to be active as their location sits on the greyline. ### Can I track historical solar conditions with HamBand? Yes, HamBand offers 7-day trend charts for the K-Index and SFI. These interactive charts allow users to monitor how solar conditions have evolved over the past week and spot incoming geomagnetic storms. ### Does HamBand require an account or subscription? No, HamBand does not require an account or subscription. It is designed to provide instant, real-time data without any setup or clutter, and it is completely free with no ads. ### Is HamBand available on Apple Watch? Yes, HamBand has an Apple Watch companion app and complication. This allows users to check band conditions and key solar indices directly from their wrist without needing to use their phone. ### How frequently is the data in HamBand updated? HamBand always fetches fresh data directly from NOAA's Space Weather Prediction Center. The app displays the 'last updated time' for the live solar data, ensuring users have the most current information available. ### What is the age rating for HamBand? HamBand has an age rating of 4+. This indicates it is suitable for a very broad audience, including young children, and does not contain any mature content. ### What devices does HamBand support? HamBand supports a range of Apple devices, including the Apple Watch, iPhone, and iPad. This broad compatibility allows users to access band condition information across their preferred devices. ## Version history (last 5 releases) ### 1.5 — 2026-07-24 Version 1.5 is a small polish release: corrected several color mismatches so band condition indicators and UI elements render consistently throughout the app. No functional changes. ### 1.4 — 2026-06-16 Version 1.4 - New widgets, greyline tracker, and accuracy fixes New • Home-screen widgets. Add HF Bands or Solar Indices in Small, Medium, or Large to keep band conditions one glance away. Medium and Large widgets have a built-in refresh button. • Greyline tab. A live world map showing the day/night terminator. When your QTH sits on the greyline, low-band DX (160m, 80m, 40m) lights up - now you can see it move in real time. Improved • SFI and K-Index are now perfectly consistent across the Bands tab, Trend chart, Apple Watch app, and widgets. No more "why does my phone say K=2 and the watch say K=2.3?" • K-Index color scale standardized to ham radio convention: green below 3 (quiet), yellow 3–5 (unsettled), orange 5–7 (storm), red 7+ (severe). • Pulling to refresh in the app now also refreshes any HamBands widgets on your home screen. Fixed • Solar Flux Index occasionally showed a placeholder value when NOAA returned a null reading for the current day. Now correctly reads the most recent observed flux. • K-Index was stuck near 2.0 due to a parsing mismatch with NOAA's planetary K endpoint - now matches the live value. • Bypassed URL caching so the app always sees fresh NOAA data instead of an older response. ### 1.3 — 2026-06-01 New in this version: an About tab! Head there to learn more about HamBands and review the Terms of Use. ### 1.2 — 2026-06-01 New: Home screen widgets let you check band conditions and solar indices (SFI, K-index, A-index) at a glance — no need to open the app. Fixed a data sync issue that could cause different SFI values to appear on the main screen versus the Trends view. ### 1.1 — 2026-05-28 No release notes. --- *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.*