WillisSDR · software-defined radio
Your FlexRadio,
on every desktop you own.
A modern, cross-platform SDR client for FlexRadio® signature-series radios — one identical app on Mac, Windows, and Linux, talking to your radio over its own network protocol. High-performance panadapter and waterfall, multi-slice receive, and radio profiles, all the same wherever you operate.
Built for operators who want a fast, clean radio
The slate-and-orange Willis theme, tuned for a panadapter you can stare at all contest weekend. Screenshots are placeholders while we finish the store builds.
A complete SDR front end
Discovery, spectrum, slices, and profiles — the full receive chain, implemented natively against FlexRadio’s own protocol.
Discover & connect
- Auto-discovery of FlexRadio devices on your network
- One-click connect and disconnect
- Works with signature-series radios
- No cloud account or broker in between
- Clear status for connection & link health
Panadapter & waterfall
- High-performance real-time spectrum display
- Smooth, GPU-accelerated waterfall
- Adjustable span, reference level & zoom
- Click-to-tune anywhere on the panadapter
- Designed to stay fluid during pileups
Multi-slice receive
- Create and manage multiple receiver slices
- Independent frequency, mode & filter per slice
- Set mode: SSB, CW, AM, FM, digital & more
- Per-slice S-meter and metering
- Fast QSY between slices
Profiles & presets
- Save and restore full radio configurations
- Band and operating presets
- Recall your favorite setups in a click
- Keep contest, DX, and casual layouts apart
- Everything stored locally on your machine
Modes, metering & filters
- SSB, CW, AM, FM & digital modes
- Per-slice S-meter and signal metering
- Adjustable filters & passband
- Real-time readouts as you tune
- Need a logbook? Pair it with WillisLogger
Native protocol, done right
- Full implementation of FlexRadio’s VITA-49 protocol
- Direct network control — no middleware
- Real-time metering & spectrum streaming
- Engineered for low latency
- Reliable reconnection handling
Truly cross-platform
- The same app on macOS, Windows & Linux
- Native desktop experience on each
- Consistent layout and shortcuts everywhere
- Run your radio from whatever’s on your desk
- No platform left as a second-class citizen
Private by design
- Talks only to your radio on your network
- No accounts and no servers we run
- Zero telemetry, analytics, or tracking
- Profiles & settings live in local files you own
- Read our Privacy Policy
One-time purchase. No subscription.
WillisSDR is a tool you own, not a service you rent. Buy it once, per platform.
Each platform is a standalone, one-time purchase — no subscription and no cross-platform bundle. WillisSDR is in the final stages of store approval; check back soon or get in touch to be pointed to it at launch. Privacy Policy · License
The radio is yours. The software should be too.
FlexRadio makes exceptional hardware, and SmartSDR® runs on both Windows and Apple platforms — but the Windows and Mac versions are radically different, and Linux isn’t in the picture at all. WillisSDR takes a different approach: one identical app across Mac, Windows, and Linux, with the same fast panadapter, the same multi-slice workflow, and the same shortcuts everywhere. You buy it once, it runs where you run, and it talks straight to your radio with nothing in between.
“Your radio speaks a network protocol, not a subscription. WillisSDR just speaks it well — on whatever computer is already on your desk.”
Get ready to fire up the panadapter
WillisSDR for Mac, Windows, and Linux is on the way. Want a heads-up when it lands? Reach out through our support center.
FlexRadio®, SmartSDR®, and the signature series are trademarks of FlexRadio Systems. WillisSDR and Lacy Digital Labs, LLC are independent and are not affiliated with, endorsed by, or sponsored by FlexRadio Systems. All other product and company names are trademarks of their respective owners.