I have, BTW, just received a $6.50 watch with touchscreen, microphone and speaker, much better build quality, BT 3, 4.2 and 5, plus the traditional fake heart rate sensor and a bigger battery with an actual label on it. It's powered by a YC1133 which contains an ARM Cortex M0 with 56kB RAM and 4MB flash. This would be an awesome device for hacking if there was any information about it whatsoever.
Weirdly, it runs a more complex version of what's clearly the same software stack as the LT716!
It’s a slightly odd, somewhat lonely feeling to see something so universally beloved and popular and feel nothing.
https://youtu.be/LjfkynJ4hbI?si=rMrpX7VChQMX23_I
(Obviously not the only one if not getting Far Side comics made the Simpsons!)