Cannot test it. I don’t have an Apple pc. When is it available on Windows?

Hello, and thank you for your interest. audiolaz Room runs on Windows too, as well as on Mac and Linux: the iPhone is only the measuring microphone, the correction runs on your PC. To join the beta, apply here: https://audiolaz.com/apply, and you'll receive your own download page for Windows.
Alexandre, audiolaz

You've been invited by ALEXANDRE BESSON to be a tester for their app, audiolaz Room. If you no longer want to receive TestFlight invitations from ALEXANDRE BESSON, contact the developer to request removal from their tester list.
Got a mail on the 10th of october
Reagrds Peter

Hi Peter, the Windows version is available now, and your beta access is in your inbox (from contact@audiolaz.com), with your own download page. The TestFlight invitation was the iPhone app, which serves as the measuring microphone; the correction runs on your PC. Enjoy, and tell us how it sounds!
Alexandre, audiolaz