There is probably the perfect app hiding somewhere in the App Store, but none of my searches showed it. I probably don't know the right terms to try.
It's fairly easy to add an appointment to the Calendar app in Day or Week mode. You just tap-hold on the timeline roughly where you want the appointment, then drag it to the exact time/day. Unfortunately the native Calendar app defaults to hour slots, and I don't see any way to change that, but as long as the appointment is still highlighted you can drag the bottom dot up, shortening the appointment.
Then tap the title and type in the name.
Fantastical 2 can also add appointments using the tap-hold-drag-drop method. However it does not have a day view, just a week view. Though, that should work pretty well if all you are doing is adding names. Unlike Calendar, Fantastical 2 has a setting so you can change the default appointment duration.
I played with it a bit, and only needed a small amount of practice before I could make a new appointment and name it very quickly.
One of the nice things about Fantastical is that you can have lots of info, or get rid of everything but the week/timeline view; for a very simple view.
It's still overkill for the job, but it's also the only thing I can think of>
Calendar 5 probably works about the same way. I no longer have it loaded to test.
You could always roll your own with a spreadsheet app like Numbers, though you are then looking at a lot of overhead copying and tracking tables for each day or week.
Or, long story short, all I have are workarounds, not the ideal solution.
