LastRock

1

Create a free Firebase project

Go to console.firebase.google.com → Create a project → name it anything → disable Google Analytics → Create project.

2

Enable Realtime Database

Left sidebar → Build → Realtime Database → Create Database → pick any location → "Start in test mode" → Enable.

Copy your Database URL — looks like https://your-project-default-rtdb.firebaseio.com

3

Get your Database Secret (this is your password)

In Firebase → click the ⚙️ gear icon → Project Settings → Service accounts tab → scroll to the bottom → click "Database secrets" → click Show → copy the secret. If it's empty, click Add secret first.

4

Lock down the rules

In Firebase → Realtime Database → Rules tab → replace everything with this → Publish. This means only people with your secret can access the data:

{ "rules": { ".read": "auth != null", ".write": "auth != null" } }

5

Connect & share with your partner

Hit Connect below. Share the same URL + Secret with your partner — they paste both in their LastRock and you're both synced privately.