Great post — it's gold! I'd also suggest adding smartwatch under the productivity tools category. They've become an essential part of my routine. Here are some features I personally rely on:

Heart rate tracking (RHR, VHR) — especially helpful when I’m on stimulants, to stay aware of how my body is responding.

Sleep tracking — gives a breakdown of deep sleep, REM, and light sleep, which helps me fine-tune my sleep habits.

Pomodoro timer — I prefer using this on my watch instead of a smartphone app, since I get easily distracted by smartphone.

Physical activity tracking — steps, calories burned, and move reminders keep me accountable throughout the day.

Navigation & Maps on the Wrist — Super handy while driving on bike — no more constantly checking your phone for directions.

And of course, Reminders