I use colornote. You can add different coloured text notes to each day on the calendar portion.
If you swipe right on the app page of screenshots it will show the calendar portion with the coloured squares which are minimized notes. I use different colours for different things. Blue for pills, Red for appointments, Green for bills etc. Then you just click on the day on the calendar and it will bring up what the notes are.
https://play.google.com/store/apps/details?id=com.socialnmobile.dictapps.notepad.color.note
Edit: spelling