Start a task, say what it is for, and how you feel about that thing. When you stop, it asks again. The distance between the two answers becomes a particle in orbit.
Free · no account · stays on your machine
Why it is not a timer
How long you gave it decides one thing only: how brightly the particle burns.
How far you moved sets its orbit, its gravity, and how long it lasts.
An hour you felt nothing about shines faintly. A minute that changed you does not.