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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.
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.

Introduction

Learn what Tuck is, why it exists, and the philosophy behind capture-first design.

How Tuck Works

Follow a thought from your mind to your encrypted vault and across your devices.

Quick Capture

Open the composer, type a thought, and tuck it — no setup, no folders required.

Security Overview

Understand AES-256-GCM encryption, your passphrase, and your recovery kit.

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Get Started in Four Steps

1

Get an invite and create your account

Enter your invite code at 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.
2

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.
3

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.
4

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.