The day, from three angles.
What you are doing now. Where the hours have gone. What is actually booked. Three screens over one day, because the answer you need depends on why you are asking.
My Day
Now, next, and what is left. The screen you leave open — it answers "what am I supposed to be doing" without you having to work it out from a list.
Timetable
The day and the week as blocks of time. Drag work onto an afternoon and it has a place; a six-hour job becomes three blocks across three days rather than one impossible entry.
Calendar
Day, week, month and agenda — the diary proper, with appointments, meetings and the blocks you have set aside sitting in the same grid.
Setting time aside is a diary entry
Not a note in a separate planner. A block you make here is in the same calendar as your appointments — so it syncs where your diary syncs, and it reminds you the way an appointment does.
Cancelling a block gives the time back. A cancelled block is not time set aside, so the task it was holding goes straight back to the Inbox as unplanned work rather than sitting there looking scheduled.
Work split across days stays split. There is no single "starts here, ends there" on a task, because the moment you reschedule half of it that pair of dates would be a lie — the blocks themselves are the answer.
More about Quooro Planner
One day, three views, and no second copy of it anywhere. Move a block on the Timetable and My Day and the Calendar have already changed.