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

# Tuck Docs: Capture, Encrypt, and Sync Your Thoughts

> Start using Tuck confidently — learn to capture thoughts, set up your encrypted vault, sync across devices, and tuck ideas straight from email.

Welcome to the Tuck documentation. Tuck is a local-first, end-to-end encrypted thought-capture app that gets out of your way: no folders to navigate, no friction between you and the page. Just tuck the thought, and your vault handles the rest — encrypting it on your device before anything leaves your hands.

<Note>
  Tuck is currently in early access. You need an **invite code** to create an account. If you don't have one yet, join the waitlist at [tuckthis.app](https://tuckthis.app).
</Note>

<CardGroup cols={2}>
  <Card title="Introduction" icon="book-open" href="/introduction">
    Learn what Tuck is, why it exists, and the philosophy behind capture-first design.
  </Card>

  <Card title="How Tuck Works" icon="gear" href="/how-tuck-works">
    Follow a thought from your mind to your encrypted vault and across your devices.
  </Card>

  <Card title="Quick Capture" icon="bolt" href="/capture/quick-capture">
    Open the composer, type a thought, and tuck it — no setup, no folders required.
  </Card>

  <Card title="Security Overview" icon="lock" href="/security/overview">
    Understand AES-256-GCM encryption, your passphrase, and your recovery kit.
  </Card>
</CardGroup>

## Get Started in Four Steps

<Steps>
  <Step title="Get an invite and create your account">
    Enter your invite code at [tuckthis.app](https://tuckthis.app) and sign up with an email address and password. Your **account password** signs you into the app — it never touches your vault or your thoughts.
  </Step>

  <Step title="Set your vault passphrase and save your recovery kit">
    Choose a strong vault passphrase — this is what unlocks your encrypted vault on each device you use. Then download your **recovery kit** and store it somewhere safe. Losing both your passphrase and your recovery kit means your thoughts are unrecoverable by anyone, including Tuck.
  </Step>

  <Step title="Tuck your first thought">
    Open the composer from anywhere in the app and type whatever is on your mind. Hit **Tuck it** — your thought is encrypted on your device instantly. Add a tag or assign it to a Brain whenever you're ready, but you never have to before saving.
  </Step>

  <Step title="Capture from email or iPhone">
    Send a thought to your personal **send-to address** (`you@sendto.tuckthis.app`) from any email client to tuck it without opening the app. On iPhone and iPad, use the native Tuck app or the share sheet to capture anything from any app — unlocked with Face ID.
  </Step>
</Steps>