Antenna GT vs HamAlert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Antenna GT
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This application provides the ability to compute the performance (aka 'figure of merit') of a parabolic reflector antenna. To use this app you will need to measure the noise produced (dB above cold sky noise) by the Sun at the desired radio frequency. To compute results please enter: Antenna Site location; Antenna ID; Antenna Size; Antenna configuration; Polarization of test; Frequency of test; and Antenna elevation. The application will then go and automatically get the most current solar flux to calculate the results. The application then computes the results and stores multiple result runs in a log that can be emailed to yourself or others.
HamAlert
Receive instant push notifications for desired amateur radio contacts. Filter alerts by various criteria like callsign, band, mode, and location. Stay updated on DX spots from multiple sources.
- Push notifications for desired stations
- Filter spots by DXCC, callsign, and location
- Support for Reverse Beacon Network, SOTAwatch, DX cluster, PSK Reporter
- Filter by band, mode, and time
- Filter by spotter callsign and DXCC
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This app is a companion to the HamAlert web site (hamalert.org) and lets you receive push notifications from HamAlert. HamAlert is a system that allows amateur radio operators to get notifications when a desired station appears on the DX cluster, the Reverse Beacon Network, SOTAwatch, POTA, WWFF Spotline, or PSK Reporter. Spots can be filtered by various criteria, including: • DXCC (both actual and callsign home DXCC) • Callsign • Island reference • Summit reference • Park reference • CQ zone • Continent • Band • Mode • Time and days of week • Source • Spotter callsign and DXCC
Screenshots
Verdict
The clearest difference is update cadence: HamAlert at every 5 months against Antenna GT's every 47 months. HamAlert also leads on iOS requirement (15.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Antenna GT ships an update every 47 months, HamAlert every 5 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.
| Parameter | Antenna GT | HamAlert |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (34 ratings) — better |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | — | 34 — better |
| Update frequency | Every 47 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 1 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Dave Massey | Manuel Kasper |
In-app purchases
Antenna GT
No in-app purchases
HamAlert
No in-app purchases
