Open your guide
Enter the license key from your Gumroad receipt. You only do this once on each phone or computer.
Can't find your key? Search your email for "Gumroad". The key is in the receipt and on the page where you got the guide.
New phone or laptop? Enter the same key there. Your progress follows you. You can use it on up to 3 devices at a time.
Don't have the guide yet? Get it here.