> For the complete documentation index, see [llms.txt](https://docs.apyx.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apyx.fi/app-guide/how-to-lock-apxusd.md).

# How to Lock apxUSD

{% hint style="info" %}
The information in the video below and on this page is not intended for any person in a sanctioned jurisdiction or any person who resides in, or has its registered office in, the United States, the European Union, or the European Economic Area.
{% endhint %}

Using the Apyx Earn tab, users can lock apxUSD to receive apyUSD vault shares and earn protocol-generated rewards:

1. Users lock or unlock by clicking “Lock” or “Unlock,” which prompts their wallet to sign the transaction.
2. Once confirmed, the position transitions atomically in a single transaction and users receive apyUSD (when locking) or apxUSD (when unlocking).

### Key Information

* Rewards accrue to the apyUSD vault and are distributed linearly, causing the value of apyUSD to increase over time. As a result, users do not need to claim rewards separately; simply holding apyUSD is sufficient.
* When users initiate an unlock, the amount of apxUSD received reflects the originally locked principal plus the accrued increase in apyUSD value from the time of locking up to the unlock request.
* Unlocking follows a 20-day cooldown. After the cooldown period, apxUSD becomes available to withdraw.


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