About Tunr

Tunr is a Mac & Windows audio-mastering app: drop a track and master it locally in seconds. Tuned to your genre, at release loudness, and fully offline. It's made by A. O. Signtech, an Israeli company trading as “Tunr.”

Tunr was built by Alex Pritsert, a DJ and electronic-music producer, to fix his own workflow. Existing tools meant either a monthly subscription, uploading unreleased tracks to a cloud service, or learning a 20-module plugin suite. He wanted something simpler: drop a track, get a release-ready master, on his own Mac, without any of that. Tunr is that tool.

Three principles drive it: local-first (your audio never leaves your machine), one-time pricing ($49 once, not forever), and no strings: no account to create, no cloud to trust, no subscription clock. What you buy is a ready-to-run build (signed + notarised on macOS) plus free updates for the life of your licence.

Under the hood, Tunr does what a good mastering engineer does. It matches a reference you trust, shapes the tone and dynamics, and lands the right loudness for release, just faster and without the studio day-rate.