In Ketologger you can attach notes to every Glucose and Ketone reading.
Depending on the size of your phone and how the screen is layed out sometimes it's not obvious how to add the notes.
This is the Ketone entry screen.
Scroll down to the bottom to find the note entry field.
Simply scroll down to the botton of the Glucose or Ketone entry screen to add a note. This also applies to the the edit screen.
This is the Ketone history screen. The first reading has a note as indicated by the small N next to it.
You can view note readings from the Ketone and Glucose history pages. Readings with notes have a small N next to them. Tap the N to display the note.