[ SIGNAL ACQUIRED ]

Every signal, logged. Every catch, shared.

Live shortwave from KiwiSDR receivers around the world. Record what you find, keep it in your logbook, and turn it into a reception report worth sharing.

TestFlight beta coming soon [ Request invite by email ]

[ LISTEN ]

Dial into any frequency.

Skip, drag, or type. Switch modes in a tap, watch a live S-meter, and let the signal registry name known stations as you land on them.

[ 01 · TUNE ]

Find a catch worth logging.

Explore the bands and listen to anything from news broadcasts to rare numbers stations.

[ 02 · RECORD ]

Record what you find on the spectrum.

Press and hold the waveform to start recording. Press the capsule to stop.

[ 03 · SAVE ]

Swipe up to save to the logbook. Swipe down to reject.

The captured audio lands in your logbook with its waveform, S-meter reading, receiver node, and UTC timestamp.

[ RECORD ]

Capture the signal before it fades.

[ 01 · TUNE ]

Find a catch worth logging.

Explore the bands and listen to anything from news broadcasts to rare numbers stations.

[ 02 · RECORD ]

Record what you find on the spectrum.

Press and hold the waveform to start recording. Press the capsule to stop.

[ 03 · SAVE ]

Swipe up to save to the logbook. Swipe down to reject.

The captured audio lands in your logbook with its waveform, S-meter reading, receiver node, and UTC timestamp.

[ SPECTRUM WATERFALL ]

See the signals before you hear them.

View a live spectrum waterfall straight from the node's FFT, painting ninety seconds of band history in the classic KiwiSDR palette.

VIEW: SPECTRUM WATERFALL

Spot a strong signal instantly by color, before you even tune in.

Tap the four-dot matrix in the lower-right corner to open the Operator Console, then switch on the spectrum waterfall view in the VIEW row.

Tap anywhere on the waterfall and the dial jumps straight to that frequency.
Drag the dial to fine-tune.

Press and hold the spectrum trace to record. Tap to stop, swipe up to save to the logbook, or swipe down to reject.

[ DECODE ]

Beeps and buzzes, turned to text.

Flip on the decoder and watch CW and RTTY print as readable text, live off the air. The tuner handles the RTTY passband offset for you: dial the listed frequency and the mark/space pair lands right where the decoder needs it.

Baudot resolved in real time: DWD Pinneberg's marine weather printing under the dial, live at 50 baud.

Open LOG for the full transcript: scroll the whole session, then save it to the logbook with one tap.

Morse resolved in real time: a live Dutch QSO between two hams comparing radio gear, printing as readable text straight off the dial. No code knowledge required.

Open LOG for the full transcript, garbles and all: real off-air Morse, not a scripted demo.

[ MORE DECODE MODES IN DEVELOPMENT ]

[ NETWORK ]

A world of receivers, at your fingertips.

Radio Silence streams from volunteer-run KiwiSDR receivers around the planet. Watch nodes report in live with signal strength, load, and online status as you move your ears from Iceland to the Chatham Islands in one tap.

Node selector: KiwiSDR receivers worldwide with live status

[ LOGBOOK ]

Every catch goes on the record.

Every capture is saved automatically, tagged with its frequency, node, signal strength, timestamp, and date. Playback audio and scrub the waveform to hear exactly what you caught. Search your whole history by keyword, station, or band. Sort your logbook alphabetically, by date, frequency, signal strength, or mode.

[ SHARE ]

Proof you pulled it out of the air.

Every catch in your logbook is shareable as a Reception Report: a clean data card with the frequency, node, waveform, and the space weather that carried the signal. Catch a rare signal and the app generates a Rare Intercept Card with its own rarity score. Export each card as a PNG or an MP4 that carries your actual recorded audio. Then share it with others or post it online.

Reception Report card: frequency, UTC time, mode, node, and a waveform snapshot — [ RECEPTION REPORT ]

Rare Intercept card: a rare capture stamped with its rarity score — [ RARE INTERCEPT CARD ]

10 11 12 13 14 15 16 9996.0 CWRWM MOSCOW 11384.0 USBCENTRAL W. PACIFIC 19m · 15.7 MHzBBC WORLD SVC +2 15016.0 kHzUSB · HF-GCS

[ FAVORITES ]

Your frequencies, on file.

Save a station with its own label and mode. One tap re-tunes the dial, and the app quietly picks the best live receiver to hear it on.

Favorites: saved frequencies with labels and modes

[ WE DON'T LISTEN BACK ]

Radio silence means radio silence.

We built a listening app that doesn't listen to you.

NO ANALYTICS ON WHAT YOU LISTEN TO. WE DON'T KNOW WHAT'S ON YOUR DIAL.
MAKING AN IN-APP PURCHASE SHARES AN ANONYMOUS RECEIPT, AND WHICH FEATURE PROMPTED THE UPGRADE OFFER, FOR SUBSCRIPTION TRACKING. NEVER ANYTHING ABOUT YOUR LISTENING.
NO ACCOUNTS. NOTHING TO SIGN INTO, NOTHING TO LEAK.
AUDIO STREAMS DIRECT FROM PUBLIC KIWISDR NODES. NEVER THROUGH OUR SERVERS.
LOGBOOK & RECORDINGS STAY ON-DEVICE OR IN YOUR OWN ICLOUD.
IN-APP PURCHASES ARE HANDLED ENTIRELY BY APPLE.

[ Read Full Privacy Policy ]

[ STANDING BY ]

The bands are open.

TestFlight beta coming soon [ Request invite by email ]

REQUIRES iOS 17+ · TESTFLIGHT BUILD · FREE DURING BETA