Tools I use:

Apps

Automatic Time Tracking

RescueTime
Smarter Time
ActivityWatch

Symptom Survey and Time Tracking

MySymptoms

Food

Bitesnap

Cognitive Tests

Anki
Amphetype
used to use
Quantified Mind
humanbenchmark.com
memorize the order of a deck of cards

Journaling and note taking

Notepad++

Devices

Xiaomi Mi Band
UECG
Mbientlab
Oura Ring
(rarely) Contec F50 and ABPM