
b2b: AI DJ partner & auto mix
Turn playlists into carts
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Free
In-App Purchases
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About
A full DJ companion on your iPhone, in sync with the library on your computer. Hear your next playlist as a mix on the drive to the gig, and tag new tracks on the way home. Works with rekordbox 7.
Let AI mix your playlist
Press play and any playlist runs as one continuous mix, beatmatched and phrase matched to perfection, with one bass line at a time. Choose AI Mix, the auto DJ, and b2b picks the order too. Put it on in the car or while you step away from the booth, and hear every transition before you play it out. Download a playlist and it plays offline.
Tag and organize on the go
Open Needs tags and your untagged tracks play one at a time. Tap a tag, or hold the mic and say it. Clear the week's new downloads before you're back at the decks. After a one-time check in rekordbox, b2b on your computer writes your tags to it.
Turn Spotify playlists into carts
Share a playlist from Spotify to b2b and see what you already own and what's missing. For each missing track, b2b finds the extended mix where you only had the radio edit, at Beatport, Bandcamp and the iTunes Store. Swipe the ones you want into your cart. Back at your computer, one click fills your Beatport cart, and you check out at the store. Every track you buy is prepped and filed, with a playlist file to import into rekordbox.
Your whole library, wherever you go
b2b on your computer publishes your library to your cloud storage, so your playlists, hot cues and tags are on your phone. What you change on the phone goes back to your computer.
Plan your back-to-back together
Share a playlist with the DJ you're playing with and build it together. Each version shows who added or moved every track.
Dig deeper into your collection
Type or say what you're after, and "melodic house around 124" becomes genre and tempo filters. AI Curator suggests what fits the playlist next, from your own library.
Your music stays yours
Your tracks stay in your own cloud storage and on your devices. b2b's servers never receive them.
What you need
b2b on a Mac with Apple silicon or a Windows PC. Your music in Dropbox or Google Drive. No library yet? Tap Explore a demo on the sign-in screen to try b2b with five Creative Commons tracks.
Terms of Use: https://b2b.audio/terms
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What's New in b2b
1.0.2
November 6, 2026
Tag a track while its preview plays. Ask is now called AI Curator.
2
Subscriptions & In-App Purchases
Plus monthly
Everything in b2b, billed monthly
$5.991 Month






