Quantified Self and Meditation
Nava Sutta

towards the end of the sutta, Buddha talked about daily progress of Dharma development.  My take on it, it is hard to track quantifiable progress daily.  You just know.  Though the sutta talks about effluents in general, it might be applicable to meditation as well.   


  Just as when a carpenter or carpenter's apprentice sees the marks of
  his fingers or thumb on the handle of his adze but does not know,
  'Today my adze handle wore down this much, or yesterday it wore down
  that much, or the day before yesterday it wore down this much,' still
  he knows it is worn through when it is worn through. In the same way,
  when a monk dwells devoting himself to development, he does not know,
  'Today my effluents wore down this much, or yesterday they wore down
  that much, or the day before yesterday they wore down this much,'
  still he knows they are worn through when they are worn through.