How to revoke the authorization to view my Google account for an app (e.g. Feedly)? I recently installed Feedly on my phone. It asked me the authorization to access my Google account. Now I want to revoke this authorization, but I don't know how to do this.

I searched on my Google account (via web) under the Security part, but Feedly is not listed there.

I have an Android 4.3 stock ROM and, if important, my Google account is not a Google+ account.
You need to go to the 'Connected sites and applications' section on the security page and click 'Review Permissions'. From here you should see Feedly listed like this:



Click the "Revoke Access" button and Feedly will no longer be able to access your account.