[misev]

We're doing this sort of tracking in a Telegram group. We just send messages with a well-defined structure:

    <category code> <time> <optional description>

e.g.

    S 2000
    W 0800
    F 0900 banana
    P 1010
    ...

    (S = sleep, W = wake up, F = food, P = poop, etc.)

Every few months I copy paste the messages from Telegram into a text file and have a script to parse, clean it up and add the dates. Would be fun to try some data science on the past few years of this data.. at some point :)