Once you've been added to our beta testers list, open the Google Play Store and tap "My apps & games" from the left menu. You should see Octopus Watch by Joy in the list of apps to update:
Tap the Update button.
Accept the additional special permissions (if any).
The download and the install should not take more than few minutes.
Tap the Open button to launch the freshly updated app.
You can verify that you have the latest version by checking the version number in the left menu.
That's it! You're ready to test the Octopus app's latest features. Your feedback is welcome at firstname.lastname@example.org.