Tunestack collects nothing about you. Not anonymously, not in aggregate, not for diagnostics.
Last updated 24 September 2026
This is enforced by macOS, not just promised
Tunestack is sandboxed and ships without the network entitlement. An app without it cannot open a network connection — macOS refuses, whatever the app's code tries to do. So the app is not merely written not to phone home; it is structurally incapable of it.
You can verify this yourself on the downloaded app:
codesign -d --entitlements - /Applications/Tunestack.app
The only entitlement listed is com.apple.security.app-sandbox.
Everything stays in Tunestack's own sandbox container on your Mac:
~/Library/Containers/com.surajkumar.tunestack/
| What | Why |
|---|---|
| Your device priority lists | The names and system identifiers of your audio devices, so Tunestack knows the order you want them in. |
| Your profiles and preferences | Profile names such as “Work” or “Studio”, and your settings. |
| Per-app volume levels | If you use per-app volume, the level you set for each app, keyed by its bundle identifier. |
Deleting Tunestack removes this folder and everything in it. Nothing is left behind, because there is nowhere else for it to be.
Switching audio devices — the main job Tunestack does — needs no permission at all.
The optional per-app levels and volume feature is different. It is off by default, and the first time you switch it on macOS asks for permission to record system audio. That is the only way macOS allows an app to see which programs are playing sound.
Audio captured this way is used only to measure levels and apply volume, in memory, as it plays. It is never written to disk, never stored, and never sent anywhere — it cannot be sent anywhere, as described above.
You can withdraw the permission at any time in System Settings → Privacy & Security. Everything else in Tunestack keeps working without it.
Tunestack can export your settings, and can save a support report if you ask it to. Those files go wherever you choose in the save dialog, and Tunestack does nothing with them afterwards. If you send a support report to us by email, you are choosing to share it — so it is worth opening it first. It is plain text and contains your device names and settings, never audio.
Tunestack is sold through the Mac App Store. Apple handles the purchase, and Tunestack never sees your payment details, your Apple Account, or your name. What Apple collects is covered by Apple's Privacy Policy.
Tunestack is not directed at children and collects no data from anyone, of any age.
If this ever changes, the date at the top changes with it, and the change will be described in the app's release notes. A version that collected data would be a different product, and would say so plainly.
Questions about privacy: support@tunestack.in