A night, counted six ways
On the difference between knowing you slept badly and knowing which part of the night went wrong.
You wake and the verdict is already in. Slept badly. Two words for eight hours of something complicated, and they are the only two you have.
The trouble is that badly hides the part you could actually do something about. A short night, a broken night and a late night all feel the same at seven in the morning, and each one asks for a different day.
The parts of a night
When a watch keeps the record, Niyavo reads the night in pieces. How long you were down. How much of that was really sleep. How deep it went, how much of it was dreaming, how close it sat to your usual hours, and how long you lay there before any of it began. Six readings, gathered into one score, already waiting when you open the app.
Without a watch the night is still scored. Niyavo works from what you can tell it yourself and leans on those parts more heavily, honest about what it can see rather than guessing at the rest. There is nothing to buy before the first night counts.
A bad night is not one fact, it is several, and only some of them are yours to change.
Knowing which part
That is the whole difference. Consistency is something you can move, gently, across a few weeks. A single short night is something you repay. Told apart, they stop being the same problem.
So let the verdict wait. The night has more to say than badly, and most of what it says is useful.