d0x0bm Hi!
Sadly the direct selection from "call history" does not work because Google does not allow it anymore.
So you need to "share" the contact with COL Reminder.
If you tap on the contact in the contact/phone app there is a "share" menu.
Here you need to share the contact with COL Reminder.
I know this is very complicate, but Google does not allwo anymore for apps to read the call history.
So I can't add it directly to the app.