Boomjack

From OK By Us · for iPhone and iPad

Every phone in the room. One speaker.

Boomjack plays your music on every iPhone and iPad nearby at the same moment, so a room full of phones sounds like one sound system. No internet, no accounts, no network to join.

Coming soon to the App Store
A big silver boombox with two blue woofers, a tuning dial and twin cassette decks.

One phone goes on air. The rest tune in.

  1. BroadcastMake a mixtape on your iPhone, or press a record on your iPad, from songs you have — on the phone or in iCloud Drive.
  2. Tune inEveryone else taps Tune In. Your station comes up on their radio's dial.
  3. PlayPress play. Every phone plays the same moment of the same song, in step, so the room hears one sound and not an echo.
An attic desk at night: a record player on the left, an old radio on the right.

Make it yours. Keep it.

On the iPhone you build mixtapes on a two-screen green machine and play them on a chrome cassette player. On the iPad you press records and play them on a turntable under the ON AIR sign.

Give it a name and it's yours to play again — the songs stay where you keep them.

A chrome cassette player with a radio dial, a mixtape behind its window, and five keys.
iPhone: the mixtape player.
A turntable with its smoked lid up, on a wooden table under a lit ON AIR sign.
iPad: the turntable.

Every listener gets a boombox.

Each phone that tunes in becomes a boombox with a real dial. Stations sit at their own places on the band, each showing the mixtape it's playing and the song on now. Touch one to tune in.

The sound comes up the moment that phone is in step with the room — never before.

A silver boombox seen from the front: a blue-lit tuning dial, five meters and twin cassette decks.

Bluetooth speakers, timed for you.

Plug a phone into a Bluetooth speaker and Boomjack times it by itself: for a few seconds it listens, through the phone's microphone, to a few soft ticks or to the music. Until that speaker is in step, it stays quiet.

Nothing it hears is kept or sent anywhere.

What's in the box

Questions people ask

Do I need Wi-Fi or the internet?

Wi-Fi has to be switched on, but you don't join a network and there's no internet involved. The phones talk straight to each other.

How many phones can play at once?

A station plays to up to eight other phones at once.

Can I play songs from Apple Music or Spotify?

No. Their downloads are copy-protected, so no app but theirs can play them. Boomjack plays songs you have as files: MP3, AAC, Apple Lossless, WAV, AIFF, FLAC and CAF, on your phone or in iCloud Drive.

Do the other phones keep my music?

No. A phone that tunes in plays the music as it arrives and keeps none of it.

Does it work with a Bluetooth speaker?

Yes. Boomjack times a Bluetooth speaker by itself: for a few seconds it listens through the phone's microphone to a few soft ticks, or to the music. Until the speaker is in step it stays quiet. Nothing it hears is kept.

Can I use Boomjack in my bar, shop or venue?

Playing music to the public needs a public-performance license — in the US from ASCAP, BMI, SESAC or GMR, and elsewhere from the equivalent body. Getting one is up to whoever runs the place.

Is there an Android version?

No. Boomjack is for iPhone and iPad.

Put a phone on every shelf. Press play.

Boomjack is the second app from OK By Us, after Buzzer Party.

Coming soon to the App Store