Yes! We have Free Plan, it is free forever., in which you can track your Sent emails without any limitations. There will be no limit on the number of emails tracked or the number of notifications you receive for those emails.
If you are an Existing user of Doubletick Free Plan and willing to Upgrade to Doubletick Pro, You can click on "Get Doubletick Pro" from Your Extention settings or You can click on "Remove Email Signature Icon" in your Email Composebox
If you are an Existing user of Doubletick Pro and willing to Change your Debit/Credit Card Details, You can go to "Subscription and Billing" from Your Extention settings > Account Setting > And Edit your Payment Details.
If you are an Existing user of Doubletick Pro and willing to Cancel your Active Subscription or Plan, You can go to "Subscription and Billing" from Your Extention settings > Account Setting > And Click on "Cancel Plan"
If you would like to revoke or remove permissions given to Doubletick for your Gmail/Google account and Log in to the Gmail account you revoke the access for Doubletick then Open this page https://security.google.com/settings/security/permissions
You'll get a Unique Link from AppSumo after your successful deal purchase. Click on it or Copy and paste the unique link in the address bar of your browser. (Please make sure your browser has logged in with the correct Google account to which you are willing to activate Doubletick)