Start a focus session from the tray or menu bar, from Settings, or by pulling Pendling down and letting go.

Settings → Focus: length, start now, and how it shows.
Settings → Focus: length, start now, and how it shows.

Length

15, 25, 50 or 90 minutes, or Flow, which counts up until you stop.

How it shows

The time shows on the rope itself: Climbing Pendling drops down when you start and climbs back up as time runs out. Or a warm glow, a caterpillar inching down the rope, a diya flame burning down, a knot counter, moon phases, a blossom opening, or an incense stick. Or just the minutes in the tray icon.

Breaks

Options

Seconds in the tray (24:59 rather than 25m), the time when you point at the Pendling, beads for finished sessions (in gold), and one ring to start, two when it's done.

Screenshots are from Windows and Linux. The Mac app has the same settings in its own Settings window.