This is a very unscientific test but the Zhiyun Play app seems to be finally usable now. Before the recent March 5th update, timelapse panoramas and face tracking were pretty much unusable on my 3 smartphones.
Previously the LG G5 which has 2 cameras, a wide angle and a more narrow focal length main camera. The panoramas would constantly be out of focus and object tracking was unusable when I tried using it to record bands at my local bar. Zy Play was constantly losing track of people and pointing in odd directions so the subject was out of frame.
With the recent update on March 5th I tried the app again on a Samsung S6, LG G5 and an iPhone SE.
Panoramas work fine on all 3 phones. Face tracking is still somewhat problematic. The iPhone SE worked the best but tracking is still slow and the app has problems keeping the subject in the center of frame. It could work if the person doesn’t move too far off center and not too quickly. I will do some tests with a band over the weekend.