How do I add a license key to gain credits?

Once the purchase is complete, please check for the email with the subject "Your Payment of $X.XX Received."

You will find the license key in that email.

Log back into your account at https://www.geophonetracker.com/webportal/ 

Go to Settings >> Add New License Key

Copy and paste the license key here.

Click Submit. Credits will be added to your account, and you can perform searches now.