Live Baudot decode & waterfall
A real ITA2 demodulator copies text over the air into a scrolling pane, with a live waterfall and mark/space tuning cursors so you park right on the signal. A squelch gate keeps noise off the screen.
RTTYAF copies Baudot over the air, keys your rig over USB CAT, and fires your macros — all natively on your Android phone or tablet. No laptop. No soundcard tangle. Just your rig and a USB-C cable.
A real ITA2 demodulator copies text over the air into a scrolling pane, with a live waterfall and mark/space tuning cursors so you park right on the signal. A squelch gate keeps noise off the screen.
Not a toy. RTTYAF keys your rig — CAT, RTS or DTR PTT — and plays a clean continuous-phase Baudot-FSK signal out the sound card. Hit STOP and it drops the carrier cleanly.
One-tap CQ, answer, report and 73 keys with {VAR} substitution — your call, the worked call, RST and exchange fill themselves in as the QSO runs.
Drive your rig directly over USB-C — CAT frequency/PTT control, audio, and a broad rig-model list, inherited from FT8AF's battle-tested cable stack.
A running serial, dupe check, and exchange capture with live score and multipliers — then auto-upload to Cloudlog and QRZ the moment a QSO is logged.
45.45 and 75 baud, 170 Hz shift, adjustable mark/space tones, USOS and reverse — set it to match the band and copy weak signals through the noise.
Grab the APK from GitHub today. A one-tap Google Play build — with automatic updates — is coming soon.
The full app, GPL-licensed and built in the open. Grab the APK or build it yourself.
A Play Store build is in the works — one-tap install and automatic background updates, delivered the moment it's live.
Want a heads-up when it lands on Play? See the FAQ →
Low volume. Release notes, field reports, and the occasional "we fixed the thing that crashed on your FT-891." Unsubscribe anytime.
RTTYAF shares its engine-room and its look with two sibling apps for Android. Run the mode you're in the mood for.