"A $20 notification appliance that looks like a smartwatch, with predictably basic execution."
The '1.39" HD Touchscreen' refers to a standard, budget-grade IPS LCD panel. 'HD' is a marketing term here with no guaranteed resolution, but IPS ensures decent viewing angles.
This is for someone who wants wrist-based notifications and the appearance of a smartwatch for the lowest possible price. It serves as a low-risk trial to see if you'd benefit from a more capable device before spending more.
Anyone serious about fitness tracking should skip this; the sensors are not medical or athletic grade. Users who want a polished app, reliable software updates, or integration with Apple Health/Google Fit will be disappointed.