There’s a galaxy of productivity note taking apps out there. Each promising to 10x your productivity or be your “second brain”.
You only need a humble notebook and a pen. Jot down the date, underneath, write your day’s tasks, notes or comments.
That’s it.
Notebooks are the perfect UI: doodle, draw your thoughts in their rawness but insightful form. Perfectly suited to your imagination rather than being locked into some designer's narrow view of productivity. Focused. No distractions. No rabbit holes to suck you into.
KISS.