iDigi
Every digital mode, one native Mac app.
SSTV, FT4, FT8, WSPR, WEFAX, CW, RTTY, PSK, QPSK, MFSK, Olivia and Contestia — decoded and transmitted from a single window, with Core Audio input, Hamlib CAT control and automatic logging to the services you already use.
Free to try. Written in Zurich by HB9ZHK, licensed since 1995.
One application, many modes
SSTV
VIS codes are detected as the transmission starts, so the right mode is chosen without a keystroke. Slant and offset corrections run live, every frame lands in the image browser, and received pictures can upload straight to your own web gallery over FTP.
FT4 and FT8
A full 15-second period decoded across the passband, with waterfall, decode list and log side by side. Spots go out to GridTracker2 and JT-Bridge as they arrive. Decoder performance is now on par with WSJT-X.
WSPR
Watch your transmissions appear on the world map and read propagation paths in real time.
WEFAX
Professional slant, offset and image controls while the chart is still coming in, so a drifting clock never costs you the broadcast.
MFSK
Receive Shortwave Radiogram — text and images broadcast in MFSK on the shortwave bands, decoded and saved as they arrive.
CW
A new decoder, 50 to 60 percent more accurate than the previous one and state of the art on weak and hand-sent signals.
Olivia and Contestia
Robust MFSK keyboard modes that hold a conversation through noise, fading and interference.
RTTY, PSK, QPSK
PSK31, 63 and 125 plus QPSK across the HF bands, with CAT control and frequency presets handled for you.
Logging
A log you don't have to keep twice
Every QSO is written to iDigi's own log window. Callsign and station details fill in from QRZ.com or HamQTH as the contact is made.
From there it transfers automatically to MacLoggerDX, RUMLogNG, GridTracker2, JT-Bridge or any N1MM-compatible logger on your machine or LAN, and uploads to LoTW, QRZ.com, eQSL, Clublog and Wavelog.
What your station has worked
Statistics over your log — bands, modes, countries and contacts over time — read from the same log iDigi writes as you operate.
Fits the station you already run
iDigi talks to the loggers, services and rigs hams already depend on, locally or across your LAN.
Logging
MacLoggerDX
RUMLogNG
GridTracker2
JT-Bridge
Any N1MM-compatible logger
QSO uploads
LoTW
QRZ.com
eQSL
Clublog
Wavelog
Lookups
QRZ.com
HamQTH
Rig control
Hamlib, over serial or network — virtually any CAT-capable transceiver
Spotting
Real-time spot display with GridTracker2 and JT-Bridge
Built for macOS
Native Core Audio and Core Image handle decoding and image rendering. Signal processing runs on Apple's Accelerate framework — fast, and easy on the battery. Universal for Intel and Apple Silicon.
Visual tools
A waterfall with adjustable speed, width, contrast, smoothing and colour themes. An image browser with filtering, sorting and export. An interactive map for propagation paths and global WSPR activity.
On the air in minutes
Connect the transceiver, pick a mode, start decoding. Frequency presets and band management are already set up; automatic VIS detection and LoTW upload need no attention once configured.
Free to try. $14.95 to keep.
The full licence is a single in-app purchase — no subscription. Prices may vary by country and applicable taxes.