01
A complete FT8 / FT4 station
Decode and transmit, follow the waterfall, choose a clear TX offset, and work a station with a tap. CQFTx manages the exchange and records the completed contact.
FT8 + FT4. OUT IN THE WORLD.
Go farther.
Carry less.
Your Android. Your radio.
A complete digital station.
Decode, call CQ, work the exchange, and log the contact. CQFTx brings portable FT8 and FT4 together—without a laptop.
v0.4.139-rc · Prerelease · Android 8+
PORTABLE BY DESIGN 40° N / 105° W
SMALL STATION. BIG POSSIBILITIES.14.074 MHz / FT8
FT8 + FT4Receive. Transmit. Connect.
Android 8+Phone or tablet.
USB + CATAudio and radio control.
ADIF logsYour contacts, ready to export.
01 / THE OPERATING EXPERIENCE
Less setup.
More time on the air.
From the first decode to the last contact,
the essentials are already in your station.
02
CQ, with the details handled
Call CQ and let the app select a valid responder. Slot timing, retries, reply selection, and QSO recovery stay together in one operating workflow.
03
Know where your signal goes
Explore station maps, PSK Reporter evidence, and NOAA space weather. Add gray-line context, a terrain horizon, and experimental path outlooks.
04
A log that comes home with you
Search and edit contacts, import ADIF with a preview and duplicate checks, and export activity logs. Optional QRZ Logbook uploads are verified by read-back.
05
Ready before you transmit
A field-readiness check brings radio, audio, time, location, and logging together. Radio and audio-route checks stop transmission when a connection fails.
06
Tools for the whole session
Synchronize time, inspect power and SWR on capable radios, use supported Tune workflows, look up stations with QRZ, and export diagnostics when you need help.
02 / TAKE IT OUTSIDE
Find a place.
Make a contact.
Make it count.
Parks, summits, trails, and the places between. Choose an activation reference, follow your progress, and keep every contact tied to the activity.
- Search cached activation locations
- Keep multiple program references on one QSO
- Export a dedicated ADIF activity log
POTASOTAWWFFWWBOTACANParks
Program-specific references, progress, and exports.
03 / INSIDE CQFTx
Your station.
A closer look.
Actual captures from CQFTx on an Android tablet.
Select any screenshot to see the details.
Find your next activation
Explore nearby parks and summits on a map of cached activation locations.
See where your signal goes
Follow reception reports on the Spots map, with paths, day and night shading, and local terrain context.
Keep an eye on your station
Live power and SWR meters on supported radios. This IC-705 capture shows 10.4 W and 1.01:1 SWR.
Estimate your takeoff angle
See an experimental takeoff estimate with a likely range, confidence, and the receiver evidence behind it.
Look ahead along an RF path
Compare experimental path opportunities now, in 30 minutes, and one or two hours ahead.
Read the band at a glance
See signals and transmit intervals in the waterfall, with your selected audio offset clearly marked.
Find a clear audio slot
Let the offset finder analyze receive windows and rank persistent openings. Choose a suggestion to set your TX offset.
Focus on stations calling CQ
Filter the decode view to CQ traffic and compare approximate contact opportunities beside each station.
Put propagation in context
Bring NOAA conditions, antenna settings, terrain context, and live receiver evidence together beside the map.
Get to know a station
Open a station snapshot for location, decode history, logged contacts, and QRZ Callbook details when configured.
Explore activation and offset options
Choose a program at the location
Review POTA and WWFF references for the same activation location.
Check the slots you plan to use
Search even transmit slots, odd slots, or both parities from the waterfall.
Compare ranked openings
Review the suggested offset, opening width, and receive-window evidence before choosing a slot.
04 / ANDROID DEVICES
Tested hardware.
Known field notes.
CQFTx requires Android 8 or newer.
This list records devices tested with the app.
| Device | Model | Status | Qualification |
|---|---|---|---|
| Tab OneLenovo | TB305FU | Field-tested | CQFTx operation and decoder qualification completed on the tested tablet. |
A field-tested entry records a known working configuration, not a guarantee for every firmware, accessory, or Android build. Read the decoder qualification note ↗
05 / THE RADIO CONNECTION
Meet your
radio’s next companion.
Built-in USB audio or an external interface.
Know what your radio supports before you pack.
| Radio | TX control | Auto RX level | Radio TX level | RX health | Power / SWR | ALC | SWR polling |
|---|---|---|---|---|---|---|---|
| QMXQRP LABS | ✓ | ✓ | — | ✓ | ✓ | — | ✓ |
| QDXQRP LABS | ✓ | ✓ | — | — | — | — | — |
| IC-705ICOM | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ |
| IC-7300ICOM | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ |
| IC-7300MK2ICOM | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ |
| IC-718ICOM | EXT | — | — | ✓ | — | — | — |
| IC-706MKIIGICOM | EXT | — | — | — | — | — | — |
| IC-7100ICOM | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ |
| IC-7610ICOM | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ |
| IC-9700ICOM | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ |
| IC-905ICOM | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ |
| Xiegu G90XIEGU | ✓ | — | — | ✓ | ✓ | ✓ | — |
No matching radio. Try a model such as QMX, IC-705, or G90.
✓ Declared capability— Not declaredEXT External PTT required
Connection requirements & field-validation notes +
QMX
Built-in USB audio and CAT. Band discovery and receiver-health checks are available.
QDX
Built-in USB audio and CAT. Band variant is inferred where possible; no power or SWR telemetry.
IC-705
Built-in USB audio and CI-V control.
IC-7300
Built-in USB audio and CI-V control.
IC-7300MK2
Native B6h identification or 94h compatibility configuration.
IC-718
Requires exact CI-V 19 00 5E identity at 19200 baud, external USB audio, and validated CP210x RTS PTT.
IC-706MKIIG
External USB audio and validated CP210x RTS PTT required. S-meter only; no power, SWR, or ALC telemetry.
IC-7100
Controller implemented; awaiting field validation.
IC-7610
MAIN receiver only. Controller implemented; awaiting field validation.
IC-9700
MAIN receiver only. Controller implemented; awaiting field validation.
IC-905
2 m through 3 cm; 10 GHz requires CX-10G. Controller implemented; awaiting field validation.
Xiegu G90
DigiRig audio and CAT. Main-unit firmware 1.80 or newer; manual audio levels.
Capabilities describe the controller, not a guarantee that every hardware, firmware, band, or accessory combination has been field-tested. Read the current operator guide before connecting. Tune support is separate from the capabilities above.
For setup, firmware requirements, and operating limits, read the operator guide ↗
06 / YOUR NEXT CONTACT STARTS HERE
Put CQFTx
in your field kit.
Get the latest published build, install it on your Android device, and connect your supported radio.
Download v0.4.139-rc ↓Prerelease build · Android 8 or newer
FROM DOWNLOAD TO FIRST DECODE
Install the APK
Open the downloaded file. If Android asks, allow installation from the browser or file manager you used.
Connect your station
Use a USB host / OTG connection and the audio and CAT interface your radio requires.
Run field readiness
Set your callsign and grid, check time and audio, then select FT8 or FT4 and your band.
BUILT BY A HAM. OPEN TO YOUR FEEDBACK.
See you on the air.
Questions, radio feedback, or a field report? Include your app version,
radio model, and what happened.