One song. All your devices.
Perfectly in sync.
Allsono makes your Mac, Android phones and iPhones play together as one sound system, without delay or echo.
Made for listening, not for setting up.
- 01
Perfectly in sync
Every speaker plays the same sample at the same moment. The clocks of all devices are measured and corrected continuously, so there is no echo between rooms.
- 02
Any device can be the source
Play your music on your Mac, Android phone or iPhone and choose where it should play.
- 03
Just your own Wi-Fi
No cables, no extra hardware, no cloud. Devices on the same network find each other by themselves and the sound stays at home.
How it works
- 01
Install Allsono
Download the app for your Mac, Android phone or iPhone. You don't need an account.
- 02
Pick a source
Make the device that plays your music the source. Allsono captures the sound of your apps.
- 03
Play everywhere at once
On the source, tap "Use as speaker" next to the other devices, or tap "Listen along" on another device. Within seconds they play in sync.
For people who listen closely.
No compression and no guesswork. Allsono sends the sound as it comes from your source and keeps every device on the same sample. These are the actual values from the app.
* Between speakers on a Wi-Fi network that works well. On a busy or weak network the difference can be larger. An iPhone that is itself the source runs slightly ahead of the speakers, because iOS doesn't let apps delay other apps' sound.
- Audio
- PCM, 16-bit, 48 kHz, stereoUncompressed: no MP3, AAC or Bluetooth codec on the way.
- Packets
- 1024 samples · ≈ 21 msAbout 1.5 Mbit/s per speaker over your Wi-Fi.
- Clock
- Shared timelineEvery device keeps measuring its clock offset to the source, like NTP.
- Precision
- < 0,3 ms *Smaller deviations are left alone; larger ones are corrected.
- Correction
- max. 2 samples per packetBy interpolation (≈ 0.2 % pitch, inaudible). Never dropped samples, so no clicks.
- Buffer
- 175 ms – 1.5 sGrows by itself when your Wi-Fi stalls and comes back down after about a minute of calm.
- Output
- Latency compensatedThe delay of Bluetooth speakers is measured and accounted for.
One sound, in every room
Throughout the house
Living room, kitchen and bathroom play the same song at the same moment. Walk around without the music jumping.
Parties and dinners
Spread the sound over several phones and laptops for a fuller sound, without one speaker at full volume.
What you already own
Use your Mac, an old phone or the Bluetooth speakers connected to them. Allsono accounts for their delay.
On all your devices
Any device can be the source or a speaker. Mix them however you like.
* As the source, Android and iPhone ask for permission through the system's screen sharing prompt. Allsono only uses the sound, never the picture. On Android, Spotify doesn't share its sound; YouTube and most other apps do. On iPhone, Apple Music can't be shared, and an iPhone as the source runs slightly ahead of the speakers itself, because iOS doesn't let apps delay other apps' sound.
Allsono next to the alternatives
| Allsono | Airfoil | WaveSync | AirPlay 2 | Sonos | |
|---|---|---|---|---|---|
| Plays the sound of all your apps | Yes from a Mac; most apps on a phone | Yes, from a Mac | YouTube and own tracks | Yes, from Apple devices | Supported services and AirPlay |
| Any device can be the source | Mac, Android and iPhone | Only a Mac | iPhone and iPad | Apple devices only | Through the Sonos app |
| Plays on your Mac, Android phone and iPhone | Yes, mixed freely | Yes, with Airfoil Satellite | Apple devices only | Apple and AirPlay speakers only | Sonos speakers only |
| Works without buying speakers | Yes | Yes | Yes | More rooms need AirPlay receivers | No |
| Price | Free | Paid, limited trial | Free with ads, 2 devices; premium unlimited | Included with Apple | Buy speakers |
Based on public information from the makers, October 2026. Airfoil, WaveSync, AirPlay and Sonos are trademarks of their owners.
Frequently asked questions
More questions and answers are on the FAQ page.
More detail is in the guides.
Question not answered? Get in touch.
How do I play music on several devices at once?
Install Allsono on every device, make one the source and choose "Use as speaker" next to the others. Allsono sends the sound over your Wi-Fi and keeps every device exactly in time.
Does Allsono work with Spotify?
Yes, with a Mac as the source: Spotify, YouTube, podcasts and other apps all share their sound. On Android, Spotify doesn't let other apps capture its sound; Allsono then tells you and keeps the sound on the phone itself. Send Spotify to your Mac with Spotify Connect instead and make the Mac the source. YouTube, YouTube Music and most other apps do work on Android. On iPhone, Apple Music can't be shared.
Can my iPhone be the source?
Yes, with one limit set by Apple: iOS doesn't let any app delay or mute the sound of other apps. All speakers then play perfectly in sync, but the iPhone itself runs slightly ahead. Have a Mac? Then make the Mac the source: everything plays perfectly in sync. With Spotify Connect or AirPlay you can still control the music on the Mac from your iPhone. Without a Mac, turn the iPhone itself down.
What about delay or echo?
All speakers play the same fragment at the same moment, within a few milliseconds on a good Wi-Fi network. Only an iPhone that is itself the source runs slightly ahead (see above). Allsono also measures and compensates for the delay of Bluetooth speakers.
Do I need internet?
No. The sound travels over your own Wi-Fi network, never over the internet. You only need internet to sign in, which is optional.
Which devices does Allsono support?
Macs with macOS 14.2 or later, Android phones with Android 10 or later and iPhones with iOS 17 or later. You can mix them freely.
Can I use a Bluetooth speaker?
Yes. Connect the speaker to a device that plays along as a speaker; Allsono measures the speaker's delay and accounts for it. Don't connect it to an Android phone that is the source: most Bluetooth speakers stay silent there.
What does Allsono cost?
Nothing. Allsono is free, on all your devices, and you don't need an account for it.
Hear it for yourself.
Install Allsono on two devices and start a song. Free, on all your devices.