Compare mixes.
Anywhere, instantly.
Offline-first, no account, and instant switching. iOS is in testing now.
Drop a rough, an A, and a B — get a link to compare anywhere. No account needed.
Compare mixes.
Anywhere, instantly.
Android beta coming soon
Cold coffee
Session
Cold coffee
read-write
01
One card, every version
A session is one song and all its mixes. OG, A, and B live under a single card — with BPM, key, and loudness tracked automatically. Nothing to dig through mid-session.
One session, every version.
Everything else you'd expect
Switch
Flip between mixes, in sync
Switch OG, A, and B instantly while it plays. You're judging the mix, not your memory of it.
Search
Find any session, fast
Search across sessions and folders by name — no more scrolling to find the mix you’re after.
Share
Share a session in one tap
Send a link so anyone can hear the mix — no app required on the other end.
Import
Import from your phone
No upload, no waiting on a connection — files save locally the moment you drop them in, ready whenever you are.
Folders
Folders for the whole project
Group sessions together so a record’s rough mixes don’t get lost in a flat list.
Focus mode
Focus mode
The player stays out of the way until you hit play — no artwork, no clutter, just the mix.
Analysis
Scope, BPM, key
Oscilloscope and goniometer views alongside BPM and key — detected the moment you drop a file.
Transport
Loop, seek, and rewind
Jump to the section you’re arguing about and loop it — it stays with you even after you step away to browse.
Null is in testing now
Null is in testing now. Join the TestFlight beta to start comparing mixes.
Join the beta on TestFlight