Sound-Field
Turn any device into a speaker
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Connect your iPhones in the room. Pick a song on the host and every device plays it at once
— even old phones or a friend's, just by installing the app.
Use the iPhones you already have as speakers.
NOTES
- Around 8 devices is a practical guideline. More devices are more sensitive
to your Wi-Fi conditions
- Streaming tracks from Apple Music and similar services cannot be played
because of DRM. Use audio files stored on your device
- No internet connection is required and no audio ever leaves your devices
WHAT IT DOES
- Pick a song on one device and every connected device plays it at the same moment
- Old devices, and devices belonging to friends or family, can join too — just
install the app. Only the host needs to have the audio file
- Adjust volume and a 5-band equalizer per device, controlled from the host
- Import audio files from your iPhone and send them to the other devices automatically
- If a call or notification cuts the music off, playback picks up where it stopped
- Works on a single device too, as a music player with an equalizer
HOW IT STAYS IN TIME
Devices agree on a shared clock and exchange only "play at this exact moment".
Audio is never streamed between devices, so a shaky signal does not interrupt playback.
Measured offset between devices is under one millisecond.
HOW TO USE
1. Set one device as the host and the others as speakers
2. Join the same Wi-Fi, or simply leave Wi-Fi switched on
3. Pick a song on the host and press play
4. Tap a speaker card to shape that device's sound
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
NO MORE SONG LIMIT
The playlist was limited to 3 songs. It is now unlimited,
and the in-app purchase has been removed.
OTHER FIXES
- Better resuming after a call or notification interrupts playback
- The bundled demo track no longer shows a Japanese title in English
- Corrected the equalizer hint, which named the wrong frequency bands
- Added VoiceOver labels for the icon-only controls
The developer, seiji honda, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- seiji honda
- Size
- 5.1 MB
- Category
- Music
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © Seiji Honda