> For the complete documentation index, see [llms.txt](https://how.smashfi.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://how.smashfi.me/custody-safe/how-to-set-up-and-use-custody-safe.md).

# How to Set Up and Use Custody Safe

### 1. **Download the SmashFi Custody Safe App** (iOS / Android).

<figure><img src="/files/VF8ve4hBNfbL6uWdZJiM" alt=""><figcaption></figcaption></figure>

### 2. **Log into your account on** [**smashfi.me**](https://smashfi.me/auth/login)  (web).

## (App ↓)

### 3. Upon launching the app, you’ll first be asked to set up security using biometrics or passcode. Then, you’ll be guided through creating and backing up your wallet step by step.

### 4. **Scan the QR code** displayed on the Custody Safe page to link your wallet.

<figure><img src="/files/tebFgHOW46YS2XI3R6Ag" alt=""><figcaption></figcaption></figure>

<div><figure><img src="/files/k0FSaRDEkEa2BQAjIMnH" alt=""><figcaption></figcaption></figure> <figure><img src="/files/o6xYLTKDur9UvB0wCJYP" alt=""><figcaption></figcaption></figure></div>

### 5. Follow the app instructions to complete setup step by step

* Private keys are generated securely on your device using MPC
* The app will guide you through creating your wallet and backing it up.

> <mark style="color:$danger;">**⚠️ Don’t forget to back up your wallet when prompted. It’s the only way to recover access if your device is lost.**</mark>

### **6.** Seamlessly transfer BTC earned through Auto-Buy, Boost, or Swap to Custody Safe — with zero blockchain fees (if eligible).

### 7. **To withdraw BTC later**: you can move Bitcoin from Custody Safe to any external wallet at any time.<br>