One phone. Three jobs.
Compare CastSound with AudioRelay and SoundWire
Compare CastSound with AudioRelay, SoundWire, WO Mic, and SonoBus for using your phone as a speaker, microphone, and webcam on Mac and Linux.
CastSound is built for one everyday job: hear your computer through your phone, speak back, and show video in one connection. The free tier works without an account; CastSound Lifetime unlocks unlimited streaming. Other products may be a better fit when you need Windows support today, Android-only playback, or group sessions for musicians.
| Feature | CastSound | AudioRelay | SoundWire | WO Mic | SonoBus |
|---|---|---|---|---|---|
| Platforms | |||||
| macOS app | ✓ | ✓ | — | — | ✓ |
| Linux app | ✓ | ✓ | ✓ | ✓ | ✓ |
| Windows app | Not yet | ✓ | ✓ | ✓ | ✓ |
| Android app | ✓ | ✓ | ✓ | ✓ | ✓ |
| iPhone and iPad app | ✓ | — | — | ✓ | ✓ |
| What you can do | |||||
| Listen to computer audio on your phone | ✓ | ✓ | ✓ | — | — |
| Use your phone as a computer microphone | ✓ | ✓ | — | ✓ | — |
| Use your phone camera as a computer webcam | ✓ | — | — | — | — |
| Connect over USB | ✓ | ✓ | — | ✓ | — |
| Use several devices at once | — | ✓ | ✓ | — | ✓ |
| Distribution | |||||
| Free option | ✓ | ✓ | ✓ | ✓ | ✓ |
| Open source | — | — | — | — | ✓ |
Comparison reviewed 13 September 2026. Product capabilities can change; verify current details with each publisher.
Publisher sources: AudioRelay, SoundWire, WO Mic, and SonoBus.