Local Android audio monitor

Turn two phones into your new babyphone.

One phone listens nearby. The other plays audio directly over your home Wi-Fi.

Download APK User guide
Open Babyphone role chooser in dark mode with Child Device and Parent Device options
Open Babyphone listening screen showing a loud audio signal
No account No hosted relay Open source Android 11+

For Android 11 and newer

Install the latest release.

Download the APK from GitHub and review the release notes before installing.

Open Babyphone is not a medical or safety-certified device and does not replace responsible supervision.

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Open Babyphone releases

GitHub releases

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Checking GitHub for the latest published build.

One app. Two clear roles.

Choose the role for each phone. The child device captures audio, while the parent device plays the authenticated stream.

Read the setup guide

Child Device

Place this phone near the child to send audio to paired parent devices.

Parent Device

Keep this phone with you to hear audio from the child device.

Listening screen in light mode showing a quiet audio signal
Listening screen in dark mode showing all six audio signal bars filled

See what the parent phone hears.

The six-step signal meter gives a calm, glanceable view of recent audio activity.

Quiet uses cyan. Loud sound uses blue. Text and bar count always reinforce the color.

Local by design.

Open Babyphone keeps its supported connection model simple and inspectable.

Network
Audio travels directly between paired phones on the same Wi-Fi or trusted local network.
Pairing
A pairing code provides mutual authentication before encrypted audio starts.
Infrastructure
No project-operated account service, cloud storage, analytics, or internet relay.
Source
GPLv3 source code, protocol details, releases, and development history are public on GitHub.