I have tried a few but they all seem to be putting the priority on features I don’t need, like recording the sounds while I sleep. I would just like a log of when I fall asleep and when I wake up.
EDIT: Here is my plan B, until I find an app: when I go to bed, I send a text message to myself. When I wake up, I do the same. It gets automatically time-stamped. Example:
“Ok Google, send a text saying Good Night to NemoWuming”
“Ok Google, send a text saying Good Morning to NemoWuming”
I have a Bip as well, and aside from the silly name I love it. Even after 5 years a single charge lasts more than a month.
It tracks my sleep and steps, and is always on (other smartwatches turn the display off to save the battery).
It doesn’t do all the fanciest things. I can’t answer phone calls or send text messages (it will display received messages), but the advantages far away the drawbacks.