Happ app for Android 9 and Newer
- Install Happ app from Google Play or the official website.
- After the first launch, the app will request permission to send notifications. Click "Allow."
- Find your access key in your account. To do this, go to the “Subscriptions”, click “Extra key”, and that’s it — your key will appear (it starts with https://…). Click on the key to copy it to your clipboard.