The same song, twice.

A rough demo and the mix you just finished. The only honest way to judge them is next to each other, at the same moment.

Switch mid-bar.

Both versions run in sync. Pressing A or B swaps what reaches your ears — the playhead never moves.

Same loudness, fair fight.

Louder always sounds better. So the quieter version sets the level and the other one is turned down to match it.

Notes on the second.

Double-click where something bothers you. Your client hears the note pop up exactly there, instead of writing "somewhere in the second chorus".

One link. No account.

Your client opens it on a phone, listens, leaves notes. You see the moment they walk in.

Approved.

One tap from your client, one notification for you. No thread of forwarded voice notes.

And plenty more inside.

This was the short way through. The app itself has a lot more waiting for you.

• Master & reference tracks
• Reference clips from a streaming link
• Blind test
• Seamless loop
• Phone, TikTok & streaming previews
• Mono and side listening
• Loudness & true peak per version
• Folders on your dashboard
• Approval history
• Install it as an app