PhosphorFAX
PhosphorFAX by Stuart Woolley: rank, rating, keywords, reviews and trend on the Apple App Store.
- Publisher
- Stuart Woolley
- Category
- Weather
- Store
- Apple App Store
- Price
- ￦1,100
- Top grossing rank
- #36
- Top paid rank
- #1
- Released
- 2026-10-17
- Last updated
- 2026-10-17
About PhosphorFAX
PhosphorFAX receives radiofax, the HF weather fax that coast stations broadcast around the clock, and paints each chart line by line on a phosphor CRT display. Hold your iPhone near a shortwave receiver tuned to a weather fax station and watch surface analyses, wind and wave forecasts and ice charts arrive the way they do on a ship's recorder. It sends as well. Turn a photo, a received chart or the built-in test card into radiofax audio through the speaker, or export it as a WAV. No internet connection. No external hardware. No account. Just your iPhone and a radio. HOW TO RECEIVE Tune your receiver 1.9 kHz below the station's listed frequency in USB, so the signal sits around 1900 Hz. Then on the DECODE screen: ARM: wait for a start tone, then receive automatically START: receive now, without waiting for a start tone STOP: end the chart and save it CLEAR: discard the chart in progress Drag to look around the chart, and LATEST takes you back to the newest line Pinch to zoom, double-tap to fit The same guide is on the DECODE screen until a chart appears. HOW LONG IT TAKES Radiofax is slow, and that is part of its charm. • The start tone lasts 5 seconds and is recognised within a second or two. • Phasing follows, up to 30 seconds, while PhosphorFAX locks onto the start of each line. If no phasing is heard, receiving begins anyway after 40 seconds. • A chart paints from the top at two lines a second at 120 LPM. A full chart takes about 10 minutes, 20 at 60 LPM and 5 at 240
Keywords
chart, start, line, takes, receive, tone
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