# HAMSignal — Solar Weather for HAM Radio > Solar weather and propagation tool for amateur radio operators. (iPhone/iPad app by Stephen Thorn.) - Source: https://appshunter.io/ios/app/hamsignal/id6760658659 (this page in markdown: same URL + `.md`) - Developer: [Stephen Thorn](https://appshunter.io/developer/1878690071) - Category: Utilities, Weather - Price: $3.99 - Age rating: 4+ - Requires: iOS 17.0 · 6 MB - Released: 2026-03-27 - Data updated: 2026-08-15 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/hamsignal/id6760658659/reviews.md ## What is HAMSignal? The solar weather app for HAM radio operators. Real-time band conditions, push alerts, and propagation tools in one place. **The problem we solve:** You know conditions are good. You're waiting for the bands to open. But most apps only tell you when there's a storm - not when the conditions improve. HAMSignal watches K-index and SFI, and tells you when a band opens from your QTH. --- **Real-Time Solar Data** K-index, SFI, A-index updated every 15 minutes from NOAA. All 8 HF bands rated open/fair/closed. **Band Opening Alerts** Push notifications when conditions *improve*. Not storm warnings - band opening notifications. Set thresholds per band. 4-hour cooldown. Based on your grid square. **27-Day Solar Forecast** NOAA's published 27-day outlook. See predicted SFI and K-index ranges for the next month. Plan ahead. **Grey Zone / Terminator Overlay** The day-night boundary on the solar disk, plus your local sunrise and sunset times. Critical for HF timing. **PSK Reporter Live Data** See which bands are active right now. Real-time spot counts, top contacts, ranked recommendations. **Historical Trends** 7, 14, 30, or 90 days of SFI and K-index history with trend indicators. **Contest Mode** Full-screen glanceable dashboard when you're in a pileup. Large K-index, SFI, A-index, band recommendations - one look. **NOAA Satellite Pass Predictions** Next 5 passes for NOAA-18, 19, and METOP from your location. **QSO Logbook** Log contacts with solar conditions auto-attached. Export to ADIF or Cabrillo for LoTW, eQSL, award submissions. **Apple Watch** K-index and best band at a glance. Complications for all watch faces. --- No account required. No subscription. No ads. Your data stays on your device. SUPPORTS: iOS 17+, watchOS 10+ ## Key features - Real-time K-index, SFI, and A-index updates - Band opening push notifications - 27-day solar forecast - Grey zone and terminator overlay - PSK Reporter live data - QSO logbook with solar conditions - Contest mode dashboard ## Chart rankings - #153 in Top Paid · Utilities (US App Store) ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/hamsignal/id6760658659/reviews.md ### 3/5 — Gute App *2026-06-06* Kann aber aktuell kein QTH speichern. Buttons dafür reagieren auf gar nichts ## Frequently asked questions about HAMSignal ### What is HAMSignal? HAMSignal is a utility app designed for amateur radio operators. It provides real-time solar weather data, forecasts, and tools to help users determine optimal times for radio communication. ### What kind of solar data does HAMSignal provide? HAMSignal provides real-time updates for K-index, SFI, and A-index every 15 minutes, sourced from NOAA. It also includes a 27-day solar forecast, showing predicted SFI and K-index ranges. ### Does HAMSignal offer alerts for band openings? Yes, HAMSignal sends push notifications when solar conditions improve, indicating potential band openings. Users can set custom thresholds per band, and alerts are based on their local grid square with a 4-hour cooldown. ### Can I log my radio contacts with HAMSignal? Yes, HAMSignal includes a QSO logbook where you can record contacts. The app automatically attaches solar conditions to each log entry, and you can export your logs in ADIF or Cabrillo formats. ### What is the price of HAMSignal? HAMSignal is a paid application priced at $3.99. There are no subscriptions or in-app purchases required. ### Does HAMSignal have ads? No, HAMSignal is completely ad-free. The app states that user data stays on the device and there are no ads. ### What devices is HAMSignal compatible with? HAMSignal is compatible with iOS 17+ and watchOS 10+. It supports iPhone and iPad devices. ### How often is HAMSignal updated? The latest version of HAMSignal is 3.1, last updated on July 3, 2026. While specific update frequency isn't detailed, the app is actively maintained. ## Version history (last 4 releases) ### 3.1 — 2026-07-03 Maintenance update: latest HAMSignal fixes and polish. ### 3.0 — 2026-04-15 Added functionality to find repeaters, ARPS, and satellites. ### 2.0 — 2026-03-30 Many new features and watchOS support. ### 1.0 — 2026-03-27 No release notes. ## More apps by Stephen Thorn - [FlowCastFinance](https://appshunter.io/ios/app/flowcastfinance/id6759520064) - [PCOSignal](https://appshunter.io/ios/app/pcosignal/id6761376614) - [SoloLLM](https://appshunter.io/ios/app/solollm/id6761718642) - [Nickel Pet](https://appshunter.io/ios/app/nickel-pet/id6779732291) All apps by Stephen Thorn: https://appshunter.io/developer/1878690071 --- *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 2026-08-15.*