Focus
Timebox
Give the day a shape before it gives you one. Put blocks of time on a simple timeline, drag them around, and see what is left. Plans stay in this browser.
An open day. Add a block, or tap a free hour on the timeline.
Click a block to edit it, or drag to move it. With a block focused, Alt + ↑/↓ moves it 15 minutes; add Shift to change its length.