I phone Record calls?

JDM, my phone is a XR. I don’t have the extras. Kim
An XR?
Then it sounds like you just need to use the calendar feature that is already there.
On the little square that has the date on it, tap.
It should open a full month calendar, on the little arrow in upper left corner, tap and it will open a full year calendar.
Find the month and day of your appointment and tap, it should highlight the date. Tap on the + sign in right hand corner and it will open a window that you can add an event into.
There you can set the reminder with your notes etc.
I use this daily, its the best way for me to keep track of appointments for myself as well as work and other projects.
I find its better than using a voice recorder because I don't have to rewind or listen to old notes to get to what I want.