> ## Documentation Index
> Fetch the complete documentation index at: https://docs.youka.io/llms.txt
> Use this file to discover all available pages before exploring further.

# License, devices, and AI model upgrades

> Understand the Youka Live free trial, perpetual license, device activations, and optional model upgrades

Youka Live uses one-time purchases rather than a subscription.

| Access                 |        Price | What is included                                                                                     |
| ---------------------- | -----------: | ---------------------------------------------------------------------------------------------------- |
| 30-minute Live trial   |         Free | Every feature for 30 cumulative minutes of successful Live separation; no expiration or payment card |
| Perpetual license      |    \$79 once | Permanent access to the app and included AI model generation on up to two active Macs                |
| Major AI model upgrade | \$29.99 once | Optional access to a newer major model generation when one is offered                                |

## How trial time works

* The 30-minute allowance belongs to your Youka account and is shared by both
  activated Macs.
* Time decreases only while separated audio is successfully **Live**. Setup,
  warm-up, recovery, errors, and Live-off time do not count.
* You can use the remaining allowance offline. The app saves usage locally and
  synchronizes it when a connection is available.
* Reinstalling or activating another Mac does not reset the allowance.
* At zero, Youka Live switches Live off and restores normal system audio. It
  does not add noise or mute your Mac.

## Buy the perpetual license

At any point during the trial, select **Buy for $79**. After the allowance is
used, select **Buy Youka Live — $79**. You can also open [Manage Youka Live license](https://online.youka.io/live/license), sign in with the account used for activation, and purchase through Stripe Checkout.

Return to Youka Live after payment. The app normally detects the license automatically; select **Refresh License** if the purchase is still shown as processing.

Your perpetual license does not expire. After it has been activated and stored on the Mac, normal playback processing can continue offline. Internet access is still required for first activation, syncing a purchase or upgrade, managing devices, and downloading updates.

## Activate another Mac

A perpetual license supports up to two active Macs.

1. Install Youka Live on the other Mac.
2. Select **Start Free Trial** or **Try Again** to display an activation code.
3. Sign in with the account that owns the license.
4. Confirm that the browser and app show the same code, then select **Approve this Mac**.

Activation codes expire after ten minutes. Generate a new code from the app if the browser says that the request expired.

## Free a device slot

Open [Manage Youka Live license](https://online.youka.io/live/license), find the Mac under **Activated computers**, and select **Deactivate**. This immediately frees its account slot so you can activate another Mac.

Deactivation cannot erase a perpetual license already stored on a Mac that remains permanently offline. If you still have the old Mac, connect it to the internet and refresh its license before transferring access.

## How model upgrades work

You do not choose a mode or AI model inside the app. Youka Live presents one Live Separation experience and automatically uses a separation profile included with your license only after confirming that it runs reliably on the current Mac.

Youka Live automatically uses the newest model generation included with your purchases:

* If you do not buy an optional major upgrade, your perpetual license keeps using its last included model.
* If you buy the upgrade, the newest included generation becomes available automatically after the license refreshes.
* Minor app fixes and ordinary updates do not require choosing a model.

When an upgrade is available, open **Manage** in Youka Live and select **Upgrade to the latest model**. After checkout, return to the app and select **Refresh** if the new generation does not appear immediately.