For iPad & iPhone

FT8 & FT4 Digital Modes without the PC

Greyline FT8 is a full-featured digital mode radio app. Built by a ham for other hams, it provides a real-time waterfall, automated QSO modes, live spot maps, QRZ log integration, callsign lookups, and seamless audio interface support. All this with no heavy PC required. In the field, pounds count and the fewer devices you need to carry, charge, operate, and manage the more successful your activation will be.

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What it does

Everything you need to operate FT8 and FT4

From real-time signal decoding to full QSO automation — all on your iPhone or iPad, connected to your radio via a simple audio interface.

📡

Real-Time Waterfall

Live FFT waterfall display lets you see band activity at a glance. Tap signals to respond instantly.

🤖

Automated QSO Modes

Standard, Hunter, and Gatherer automation modes handle the exchange sequence for you hands-free.

📻

Automatic Frequency Selection

Intelligently selects the best frequency for your QSO based on real-time band conditions. Want more control? Hold a specific frequency or dynamically change to your QSO partner's.

🗺️

Live Spots Map

Understand your propagation on an interactive world map using real-time PSK Reporter data. No more guessing who's hearing you, how far you're getting out, or whether your antenna is pointed in the right direction.

📋

Band Activity View

Decoded messages from the current band displayed in an easy to read list. Familiar color coding from WSJT-X makes it a snap to understand what's happening.

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Integrated Logging

Auto-log completed QSOs directly to QRZ, or export your log in standard ADI format for upload later.

🧑‍🔧

Intelligent Manual Log Recovery

Didn't quite finish a QSO? Moved on before you logged it? Intelligent manual logging lets you recover the data from recent conversations so you never miss a log entry.

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Callsign Lookup

Automatic callsign data lookup via QRZ.com, or the free Callook.info service for US callsigns.

🎙️

Audio Interface Support

Connect your Digirig, SignaLink, or other USB/Lightning audio interface and the app automatically routes both TX and RX through it. Just configure VOX and you're on the air!

📍

Auto Grid Square

Uses your device GPS to automatically populate your Maidenhead grid square locator, or provide an override if you're really off-grid.

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PSK Reporter Upload

Automatically reports decoded spots to PSK Reporter, contributing to the global propagation map and the ham radio community.

🌙

Dark & Light Themes

Choose between dark, light, or system-adaptive appearance. Optimized for both nighttime shack use and outdoor operation.

📱

iPhone & iPad Native

Greyline FT8 has a fully adaptive layout that makes the best use of both device's unique screen sizes. Don't want to schlep an iPad to the park? Bet your phone's in your pocket already. The experience will be great - promise!

See it in action

Screenshots

A tour through the main views of Greyline FT8.

iPad Screenshots

Waterfall Display

Live Spots Map

QSO Log

Settings

iPhone Screenshots

Waterfall Display

Live Spots Map

QSO Log

Settings

Operating modes

Three ways to operate

Whether you want full control or completely hands-off operation, Greyline FT8 has a mode for you.

Standard

Standard Mode

The classic, manual FT8 exchange flow. Call CQ, or respond to calling stations. You're in control.

Hunter

Hunter Mode

Hunter mode scans the band for CQ calls, locks onto them, completes the exchange, logs your contact and returns to calling CQ without your interaction. Be sure to comply with applicable regulations regarding automated station operation.

Gatherer

Gatherer Mode

Calling CQ and want to work as many stations as possible? Gatherer mode queues inbound replies and works through them sequentially.

FT8 & FT4 Digital Modes without the PC

Everything you need to operate FT8 and FT4

Real-Time Waterfall

Automated QSO Modes

Automatic Frequency Selection

Live Spots Map

Band Activity View

Integrated Logging

Intelligent Manual Log Recovery

Callsign Lookup

Audio Interface Support

Auto Grid Square

PSK Reporter Upload

Dark & Light Themes

iPhone & iPad Native

Screenshots

Three ways to operate

Standard Mode

Hunter Mode

Gatherer Mode

Integrations & compatible hardware