The 1.5 version of Open Tuning for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of this free Mac application is Phi Software. The application relates to Audio & Video Tools.
From the developer:
Real-time Pitch Correction & Pitch Transposition with "Diatonic Shifter 2".
You may want to check out more software for Mac, such as Skip Tunes - Spotify, Rdio, & iTunes Controls, Open-Sankore or Tunes Cleaner, which might be similar to Open Tuning.
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