Turn on progressive focus
It is a section of Focus timer, the timer settings window, marked Beta.
Open the timer settings
Press the gear at the foot of the focus timer panel.
Timer settings
The gear at the foot of the timer panel.
Switch on Progressive focus
The switch turns green.
Press Save
The next set uses the new lengths.
See how long each set runs
Move the sliders. The bars show two cycles, with the long break between them.
Breaks keep their own lengths.
Read it on the timer
The timer panel names the length of the set you are in.
Focus tab
Shows this set's length, 35 minutes in set 3.
Sets
The set you are on, then its length.
The floating timer counts down the same set length while you work in another window.
your sets keep growing
when you switch tasks.
If your sets do not grow
Two checks.
Every set is the same length
Check that Progressive focus is on and that the Maximum is above the Focus length. At or below it, the app shows: Set the maximum above the focus length for sets to grow.
The timer is not in Pomodoro mode
Progressive focus changes Pomodoro sets. Switch the panel from Timer to Pomodoro, or press P. See Timer or Pomodoro.