Options to differentiate notes for easier review

[hertz0022]

Amazing app, the best in its category.
Would be really convenient to be able to differentiate notes from each other; not all days are the same and being able to find certain particularities would be very useful over time.
Maybe just with a scale of colors for the notes indicator, like categories as "common", "to remember" etc... Or for a mood/feeling scale, e.g. "bad", "normal", "great" etc...
These might enrich the stats too, for better identify periods/details!
In this sense, a search bar for keywords would be very useful, but perhaps this goes too far against the real philosophy of the app.
What do you think?
Anyway, thanks a lot for this life-helper app!